I'm also a large person, 5' 11" 270 lbs. I carry daily and have tired my S&W cs9, cs45, 6906, 469, Sigma F, C, E, VE, Taurus 85,58, Kel tec P11, Commander size 45, Star PD and Kahr CW9. These are the ones I considered small and/or lite enough for all day carry. Of them all only the Star PD and my current carry (Kahr CW9) made the grade. The Kahr is not only light and small but very flat. It has always fired and extracted, very accurate, with a long but easy trigger pull. The Star PD is a lite weight 45 that is fairly accurate but I was always checking to make sure the safety was on(single action locked and cocked with only a saftey lever) plus it had nasty hammer bite with large hands.