Hello everyone! I'm about to pull the trigger on a MP 2.6, 1900, 4 gigs of ram, and a 30 inch Cinema Display. I'm looking to get a new UPS and I had a few questions. First and foremost, what size should I get? How many "watts" will my new system need? I may also hook up my old 20 inch Cinema Display. I don't need a ton of battery time, just a few minutes of so. I found a couple of APC models that looked good, most likely leaning that way. Thanks in advance!