The problem with the Glock recommendation is that price is mentioned here. The SR40 can be found in the $400 range, and the M&P the $450 range. Glock is going to be $500, $550 for the Gen 4. In addition, both the SR and M&P come with great steel three dot sights, whereas the terrible Glock dot-and-box plastic sights need to be replaced asap by a good sight like Trijicon for about $80.
Not to denigrate Glock, it's a great gun, but a more expensive initial investment, and no longer the only dead-nuts-reliable striker gun on the market.
Beretta PX4 .40 S&W | Beretta 92FS 9x19 Para | Rock Island Armory GI 1911 .45 ACP | Colt Python 4" .357 Magnum | Colt 1968 Det. Spec. .38 Spc. | Ruger LCP .380 ACP | Daniel Defense M4V1 5.56x45 | Alpine M1 Carbine .30 | Steyr M1895 8x56 | Ruger 10/22 .22LR |1943 Izhevsk Mosin-Nagant M91/30 7.62x54R | Remington 870 12GA