The Bushnell 2-6x or Leupold VX3 2-8x are great options. No offense to the Leupold FX, but 4x can be on the high side for functionality for off-hand shooting, just too much zoom. The 2-6x or 2-8x go lower to be more off-hand friendly, then also go higher when you're shooting from the bench.
On the cheap end, I've beat the he11 out of a Simmons 2-6x pistol scope as well, and it has held up just fine. Not nearly the quality as the Bushnell or Leupold, but it's functional.