Well currently I am feeling out a couple of different options. May actually consider grabbing up them all (I am a nerd, so phones are like pokemon...gotta catch 'em all, lol):
Dell Streak (T-Mobile)
Google Nexus One (T-Mobile)
HTC HD2 (T-Mobile....will setup for Android)
HTC Evo (Sprint)
HTC Incredible (Verizon....will mod to Sprint)
HTC Gold W (Sprint, WP7)
Samsung Epic (Sprint)
Yes, I do realize that some of these phones have been out for a while and might be considered old now, however...If I ain't used it, then it is new to me
Also might grab up an Archos 5 (Android) for the Car (will be nice with the Mac Mini and the Monitors (plus a 7" in the dash)....ultimate car entertainment system right here, lol)