off topic I know, but ever played with a Keltec PMR30 22WMR? That little light thing is hoot shoot.
/offtopic
No I haven't, it looks like fun!!!
I've been mulling over getting a .22 pistol. I have an M&P 15-22 and it's the most fun thing. I really want to add a Mark IV or Buckmark.
Depending on your intended use you could also consider the S&W M&P .22C pistol. I owned one for a year and I really loved it, I put about 2,000 rounds of mixed .22lr through it with no cleaning and it never jammed once. I was very impressed with that little pistol but I sold it to a friend to help pay for the buck mark because I wanted something a little better suited for small game hunting.