Good day folks! I'm a newbie to apple desktop.i own a 13 inch mac book pro. though i get to use mac pro in the office for video editing, i dunno that much about desktops. I'm a total zero when it comes to trouble shooting, telling the specs and set ups. I'm catching up. I recently acquired a 2nd hand imac 27inches quadcore intel icore 5 from a good friend and it's only a few months old. the unit's in brand new condition but without a UPS. can you recommend an affordable UPS for me? and what are the implications of using my imac without any ups? any set up suggestions since i will use it heavily into video editing and guitar playing (garageband). and last question, (knocking on wood) if ever something happens to the unit will Apple honor its limited warranty(depends of course on the problem) even if i bought it 2nd hand? thanks a lot. and i enjoy reading threads here, very informative. more power.