I'm a bit of a noise freak: one of the reasons I've stuck with Apple's "pro" towers for so long is so I could banish the CPU to a closet. But no more... I will be replacing my aging 2008 MacPro (and ancient, plastic Cinema HD display) with some form of souped-up 27" iMac this year. How's the noise? I expect to get one of the pure SSD options. The 3.5GHz processor upgrade is very likely. Graphics card upgrade is a possibility. Will my ears regret it? Thanks in advance!