I think the Samla will be a bit small for a Syrian - but it is a very useful thing to have for a play cage for when you're doing a clean out, or for a number of things. It does slope down a lot at the bottom so you can't fit that much in and they do need a fair bit of floor space.
If you prefer bin cages then I second the RUB 145l bin - it's a good size for a syrian as has good floor area - it's about 80cm by 60cm externally). It's the biggest one they do. I have also heard it's one of the easiest ones to cut without the plastic cracking and it has a good lid that's flat and easy to cut the centre panel out.
It does cost about £40 though. And there is another very good option for a cage you can buy that costs less than that. The Alaska cage on Zooplus - that's about the smallest size cage you'd want for a Syrian.
If the cage is big enough and set up right then it's unlikely you'll get bar chewing (that tends to be when cages are too small and not enough enrichment in the cage).
It has a nice big front door so you get good interaction with the hamster and it helps with taming too. It's one reason I prefer cages with a big front door, because that front access really helps you interact with the hamster more. When the door is open and they come up to you at the front it is more open and natural.
If you can fit something bigger than that then there are three good 100cm cages - the Barney and Alexander cages on Zooplus which are good (they don't have the big front door). And the Savic Hamster Plaza which is sold by Pets at Home which does have a big front opening door.
Another 80 x 50 cage with a front opening door is the Hamster Heaven but it needs the tubes taking out and blocking off to work well and the penthouse removing or they just end up having abnormal behaviours, nesitng and peeing in tubes etc and then get stressed when they have to keep being cleaned out. It works best with just one of the shelves in, leaving space for a 28cm wheel and a good sized house (the little pod houses are a nightmare and get smelly and aren't big enough).
The Alaska is the cheapest option. The white cat house needs taking off the shelf as the holes are too small for a Syrian. But you can just add a house at floor level and a wheel and it comes with a shelf. I'll link the other cages mentioned at the end of the post.
https://www.zooplus.co.uk/shop/small...r_cages/284288
I have one syrian in the Savic Hamster Plaza - but had to buy extra shelves and a house for it which made it a bit expensive. And one syrian in the Savic Mickey 2XL (which is basically a hamster heaven with narrower bar spacing).
I also have the Barney cage which I've used for two hamsters but found it depends on the personality of the hamster a bit. I had one very gregarious syrian who was fine in it and would come and sit at one of the little front doors to come out. But another syrian who was a bit more shy and jumpy with noises, it didn't work at all as you have to use the top door quite a bit - which is why I prefer the ones with the big front door.
Most people get an 11" wheel for a syrian. That takes up a fair bit of space in an 80cm cage.
A good basic starter set up, which could work long term - is the Alaska cage and the 28cm trixie wheel (about £9). It's not a silent wheel but most people find it fairly quiet. Then you just need a few floor toys - tunnels, hidey places etc. Cardboard pringles tubes or cardboard boxes make good hides - you don't have to buy expensive ones. I also like something hanging from the roof for extra overhead cover and use the large rat sputniks - they work well hung next to a shelf so they can get in and out easily, but in the hamster heaven they can climb in from floor level as the cage is lower than the others.
The main thing is give them plenty of substrate (at least 4" - I have 5 to 6"),a house that's open underneath and sat on top of the substrate (so they can burrow down and bury hoards and it keeps it aired and hygienic so rarely does the nest need removing - unless its pee'd in).
And variety of textures and contents for enrichment - a shelf (something to sit on or under and climb up to). And hidey places and tunnels at floor level etc. Rat sized toys work best for syrians which is why the samla could not have enough floor space. I also sometimes tie a tunnel inside to the bars - either on the side or on the roof - as a kind of roof run leading from a shelf to a sputnik eg.
And lots of nesting material. I find the thing that keeps them happiest is a big house/nesting box with a bendy bridge tunnel over the door so it's dark inside.
These are the other cages - the Hamster Heaven, Barney and Alexander are all on this page.
https://www.zooplus.co.uk/shop/small.../hamster_cages
Savic Hamster Plaza
https://www.petsathome.com/shop/en/p...r-and-rat-cage
If you prefer bin cages generally though, I'd go for the 145l RUB bin
https://www.reallyusefulproducts.co....145_0litre.php