Thanks for the posts guys. I heard that if you buy the i7 in the store, it comes with a seagate hd, that hums when you lower the screens brightness levels, and the only way to avoid this, is to order it online. Is this true?
Not True..
iMac #1 "Made in USA - BTO" i7 w/8GB RAM and wired keyboard (WD HD, Hitachi Optical Drive) = Returned due to cracked LCD, bad yellowing and bad gray banding.
iMac #2 "Made in USA - BTO Replacement" i7 w/8GB RAM and wired keyboard (Loud Seagate HD, Hitachi Optical Drive) = Returned bad yellowing.
iMac #3 "Made in China - In Store" i7 w/4GB RAM (WD HD, Sony Optical Drive) = Returned due to dead pixels. No yellowing or gray banding.
iMac #4 "Made in China - In Store Replacement" i7 w/4GB RAM (Quiet Seagate HD, Hitachi Optical Drive) = Returned due to bad gray banding. No yellowing
iMac #5 "Made in USA - In Store" i7 w/4GB RAM (WD HD, Pioneer Optical Drive) = my only complaint is an audible oscillation from the lower portion of the machine. Fan, or? It is not too bad and I would rather have a little noise over a crappy display. I also heard similar noises from at least one of the other machines. Never really cared about testing the noise as the display was always the problem.
IMO, the only thing that I can see as a constant (having had these 5 iMacs in the last 6 weeks) is that the BTO's that I got had the worst displays of them all. They both had significant yellowing and gray banding on the bottom. The 3 in store were pretty darn good in comparison.
I have to offer my recommendation of not buying a BTO imac and getting one from the Apple Store.
Also, this last iMac had the buzzing when turning the brightness down from full brightness to about 50%. This noise has gone away after performing a SMC reset.