iMac purchase - Update
Just a quick note to say thank you to all those who answered my questions earlier this year (re iMac screen yellowing)
I've since gone ahead and purchased a "refurbished" 27" iMac from Apple, - couldn't be better.
Big, fast, and very very quiet.
I do a lot of graphics work and the big screen is perfect, I spread out all the menus in Photoshop and still have a good view of the work.
I also watch TV via EyeTv, way better than my old Sanyo (CRT) monster.
So if you're wondering about buying an iMac, new or refurb, I say go for it!