So, now that a few people have their quad core imacs at home in front of them. How have they been running?? Any signs of problems that were associated with the C2D iMacs eg Unusually Long Start Up Times Screen Flicker / Black outs Noisy whine from Screens / HDD's Sleep / Wake Up Issues CD Drives Scratching Disks Any other problems? (Apart from the small number of DOA imac's. Just so I know what to look for when I get delivery of the i7 (eventually) Cheers!!