@KookyOliveSwan - I hope you haven't been even remotely put off your lovely Zimmerman dress by the shitty insulting comments that some people think it's fine to make. Ignore them - please wear it & love it, lots!
The Monsoon dress is fine - but I think you can do better than something where you say you "quite like it" & it's "totally inoffensive"?
It seems more of a waste to me to buy a dress you don't like that much for £112, than it is to buy a designer one that you absolutely love & will wear many times for £600.
I don't know what colours & styles/brands you like aside from pink & cream, romantic & pretty. But for under £150 you can get another Zimmerman dress on eBay or Vinted - or another brand that does lots of pretty, beautifully made dresses that you can wear again - such as Erdem. And they're almost all silk or other natural materials - the Monsoon one is 100% polyester, both dress AND lining ...?