Another vote for S&W M&P22 compact. Not quite in your budget but mine has been 100% reliable with even the cheapest ammo. It's actually very impressive for a run of the mill rimfire pistol.
I think, within your budget, the Taurus TX22 would be a solid choice. I've never shot one but they get good reviews. If I were in the market the TX would be in the top three beside the M&P and SW.