I am going to be purchasing the 27"iMac (as soon as I decide which model). I am new to Apple and their customer service. Is there any hidden benefit to buying in an Apple Store vs. Apple online vs. Apple online reseller (amazon, maccconnection, etc) Should I just find the best price and go with that or do apple store customers get better service at the genius bar? I am a member of PPA and eligble for the teacher discount. Pretty sure I won't be able to use those in conjunction, though Thanks for any advice!