I picked up a Walther PPK a while ago because the price was right and ... well, it's James Bond's gun. And although it's pretty accurate for such a short thing, the backstrap will bite without a little dremel work and it gets persnickety if the ammo's dirty.
If I was just looking for a gun of that size and caliber, I'd try the Sig. If size matters more than caliber, move up to 9mm and your choices increase greatly.