No rush - they can be difficult decisions and you have to live with them. Some people used to get the Ikea Lack Coffee table for a tank etc as a stand. It's only £40. It's only 118cm long so there would be a slight overhang each side but not that much. It is very deep though and might take up too much space. Comes in black, white, oak or light oak.
LACK black-brown, Coffee table, 118x78 cm - IKEA
Or a kallax unit on it's side - if you have room - it's 147cm so longer than the tank - you might have some overhang depthwise but should be fine - I have my plaza cage on the smaller one. you can get double height storage or single height storage. Single height would make it easier to access the top of the tank and is cheaper £29 v £44. I put a hemp mat on top of mine under the cage, so it doesn't slide around as the top is smooth and slidey. But then a tank is heavier than a cage.
KALLAX white, Shelving unit, 42x147 cm - IKEA
KALLAX white, Shelving unit, 77x147 cm - IKEA