A most Excellent Choice
Red Tornado - a most Excellent set of Choices awaits you...
I have First Hand knowledge of what I speak (I carry the P-3AT as well - GREAT B.U.G.)...
I have TWO Platforms to strongly suggest. EITHER:
The NEW Taurus Mil Pro Series in 9mm (PT111), .40S&W (PT140) .45ACP (PT745) or .45ACP (PT145). Great SA/DA trigger (SA is the default and preferred mode with DA second strike capabilities) - VERRRRY Sweet Trigger System, AND and external Safety. VERY reasonably priced at around $300 NIB. I purchased all three (111, 140, 745) in a matched set and have been VERY Pleased! LightWeight, Great Size, Great Capacity, Great Accuracy and Great Price!!!
OR
The New XD-SC (compact) Series (again, in 9mm, .40). GREAT Shooter, Striker-fired, single-action-like trigger pull, flawless trigger system, grip safety and VERY Accurate! LightWeight, Great Size, Great Capacity, Sub-$400 price point and Fun To SHOOT!!! I own the XD series in 4 calibers - the XDSC in .40 - and have been Very Pleased!
Gotta love the Choices!!!