I am not sure if I'd be better on in a college like collingwood, because online there is a general consensus that it has the best facilities.
Is the difference that significant?
I'm not too up on all of the different colleges, i made my decision from the information on the website, i grew up fairly close to Durham so knew a little bit about the colleges and had originally thought i would like Hatfield, then after some reading of the websites i decided on Castle.
I've visited Grey and St Aidans both of which look ok from what i've seen but again it's all down to personal taste. I liked the traditional side of college life so that's why i went for Castle. someone else might be along soon with more info.
If you're still undecided after reading through the websites, perhaps a visit to the colleges might help you decide.