[JBH316]

I would go for it.

It doesn't sound like your partner is opposed to it - he's probably just thinking she has a perfectly good cage so what does she need another one for. I've often thought the very same thing when I've seen another cage I like better If you feel the Barney would be better for her, once it's all set up and she is settled in, then I am sure he will think it was worth it