When the M9 is altered to not have a slide-mounted safety, a DA/SA trigger, or an exposed barrel... then pick the M9. Until then... Glock 17/19/26.
If you need DA/SA... get a FNX-9, FNP-9, Sig P226/9, HK USP/P30.
Rifles: Custom AR-15, Tavor, Arsenal SGL 31-68
Handguns: Colt Python, XD(M) 4.5" .40, Glock 19, M&P 9mm, Walther PPQ 9mm, FN FNS-9, HK P30S 9mm, Walther PPS 9mm, Browning Buck Mark