Hi jmdeegan,
"Low end budget" is a little vague, but I've been very happy with using 1 AF540fgz and 1 AF360fgz wirelessly triggered by the K10D's onboard flash.
This setup is pretty flexible, as the 2 pentax flashes allow you to control how much light each contributes to the exposure in PTTL mode. They also allow you to experiment with full manual and auto flash later, but let you get started now.
This combo, plus an umbrella, a reflector and a backdrop give a ton of options. Do you already have tripods (or something) to attach two off camera flashes? The 540 comes with a "table top" stand so it will stand upright on it's own, but it's still only 5" high.
For this shot, I kept the 540 on camera, but the 360 was to my right, all PTTL. That's why I got a shadow to the left of the dogs. I only recently got a k10, so I was used to using having the one flash on-camera with my K100. Having 2 crossed off-camera flashes would have given a more 'professional' result, imho. Too bad I didn't think of it at the time -- I'm learning, too.
Good luck with your decision... post up some pics when you decide on something!!!
There are other PTTL flash options as well, if the 540 doesn't fall under "low budget". I have no experience with those units.
-Chris