You and I live just far enough to be annoying. I have 2 Xcal2's, 3 X3's, and an X4 at my disposal. I still use the Xcal2 with the old school Livelink 4.2 for my WOT tuning. I use the X3 for part throttle. I haven't bothered to switch the cable from serial to firewire.
I'm looking forward to coming down for that October mustang show you were telling me about