While I may not be quite as tech savvy as others here, I notice that Steve's PowerMac G5 is considerably faster than my iMac, and my iMac is pretty fast.
I dunno -- having something more than the iMac isn't really important (IMHO) if you're doing anything less than working with large media files, as Steve does. Heck our roommate just cut his film on his iBook, which isn't nearly as fast as my iMac, so you can do the home movie thing on the iMac, too. Macs don't need to be expensive unless you *need* them to be (for the specs).
I say, get the iMac, unless someone more genius than I (nearly everyone here) says otherwise.
