so dont eat me please but im a newbie to macs and looking at the imac (the sheen is attracting me, but heres the things i was hoping you could help me with 1) worth buying? im looking at the 27 inch imac with the i7 and may upgrade to 8gb of ram im a photographer and will be looking at running photoshop on their in the near future so im thinking this is more then likely the best system for me all things considered would i be right, im intreste in other peoples experiances (also do i really need to splurge on the extra ram, can it be done later maybe) 2) windows user i have been using winows since i was 5 and have never known any different, is the shift that severe or should i be able to pick it up in a couple of weeks? 3) new roll outs? i know that apple roll out new generations of their hardware pretty often (ipods an phones for example) is that the case with the i mac and what is the likely hood of their being a new roll out within the next 2 months ? (ue to student discounts eligedbility i ask this) 4) new roll outs making a difference? if there are new roll outs will they really be that large an improvement on the specs im allready looking at all?