Good advice from Mark especially re. HW45 which IMO (as a ex-owner) carries an over-inflated reputation based on a perception of high-power and high-quality...don't get me wrong, its by no means a poor gun - its just that's theres so much better readily available that get overlooked just because they don't produce 5.5ft/lbs.
Personally in your price range I'd suggest a Tau-7 would more than fit the bill as well as those above...