I think Groucho has earned that title hands down. Maybe I could be "Deputy Pentax Pusher". I did offer advice that if the XT is desired, then act quick.
Just call me the general of the Pentax Army. Now I can sit back and have my soldiers all deliver the firepower for me.

$399 for a DSLR with lens, no rebate needed - what more convincing do you need?

$50 for the K100D with lens. Both also are the only entry-level DSLRs with all of the following... 2.5" LCD, second LCD on top, spot metering, DoF preview, and a kit lens with a metal mount, real focus ring, and a non-rotating front element. Really, they sell themselves once you do the research.
Anyway, there are three big reasons for a DSLR in my opinion:
1) Feel. No PnS, even the best bridge camera, had the feel of an honest SLR. Real zoom rings, real focus rings, real mirror, real shutter, etc.
2) Control. Control over the photo and the ability to mount a lens that can accomplish a specific effect not possible with another lens, like a very short DoF, or a macro, or a fisheye, or whatever.
3) Image quality, and this comes down to the sensor.
The usual APS-C sensor in a DSLR is about 10x larger than even the larger sensor you might find in a PnS, and about 15x larger than the common 1/2.5" that you'll find in most PnSs, even the expensive long-zoom ones. (Fuji being the exception, but they're far smaller than a DSLR sensor as well, maybe 9x smaller.)
It's all about the sensor, baby!