Makarov. Like it has been stated, the Soviets used them from 1951 until the 80's or so, the simple design IS genius, and it's surprisingly accurate.
If you have any gun shows nearby, buy your ammo there. The Wolf steel-cased stuff is what the pistol was built for, and Wolf 95 gr. FMJ costs around $5.50/50-round box at my local shows. JHP is higher, but if it will be your range gun, the FMJ will be fine. You'll enjoy shooting it, your friends will enjoy shooting it, and it does have that Eastern Bloc Cool!