I considered the 27" but just felt that the display was too big, I'm glad i went for the 21.5" version. It's just the base model as the better version (or the addition of options) is big money for a tiny increase in performance.
I installed windows on it all by myself! imagine that !!
There's some software that comes already on the mac called bootcamp. This allows you to partitian the HD and add a second os. It was fairy simple though there was one stage that I couldn't get past and had to look for instructions on youtube lol.
I've had the imac for a few weeks now and i still find very sexy
