Hello everybody I have been looking at macs for years now and i have always passed and taken the cheaper road with a pc. Well after 3 PCs giving me an average lifespan of 4 years and the most recent one's (last 2 actually) motherboard dying on me, ive decided to finally make the jump to mac. I was looking at an iMac 27" with 3.4 i7, 2 TB HDD and 1GB video card. Thru my work discount, the price wasn't bad for my range, but on the high end of it. Longevity and Bang for my Buck are 2 big issues for me and I want my machine to be sustainable and not be out of date in 6 months, obvious I know. I use my computer mainly for music, web browsing, photos and video. I did video editing back in college in '07 and i want to get back into it if i can find the time. I also do dvd ripping and encoding but I have cut back on that. Screen size doesnt matter much to me, so Im debating on scaling it down to the 21.5 iMac w/ 2.8 i7 and 512 mb video card. Will i see much performace difference between these 2 processors and video cards? Any advice would be very helpful. Thanks.