New iMacs
I am contemplating this decision as well. My Performa 6400 is way long in the tooth. I've been working in WinTel offices lately and have to admit not really being into coming home and "playing" with a computer as well. Lately, though, I have been getting into some personal computer projects and need to upgrade.
Since I have not been into Macs heavily lately, I was thinking about getting a decent iMac, getting back into things, playing with OS X, that sort of thing, and then thinking about upgrading to a tower in a year to a year and a half based on what I learned with the iMac. Don't worry, I have uses lined up for the iMac after upgrading -- not a problem with wasting money now that could be spent later on the tower.
The one thing that I would really like, though, would be a combo (CDRW, DVD playback) drive... Have not seen any rumors on that being available for the iMac -- although it is available for the iBook, TiPB, and tower models... Anyone else hear rumors?