Amazon's FINALLY shipping these out, I hear. I know the 20" iMac is a favorite, here, but after sifting through specs, I wanted to ask -- is the $400 leap from the 17" to the 20" worth it? Obviously, you gain the better/bigger screen, slightly bigger HD, etc. but $400 could also be put to use on a 20" external LCD, and upon finding a screen hack, you get 2. 17" + iLugger also seems more of the "portable" option; but I'm thinking 6 months down the line in resale value. I'm only needing this to do short term video work until MacTel. Opinions?