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; 92FS; 92S; 8040G | Sig Sauer SP2022; P6 | Colt Python 4"; 1968 Detective Special 2"| Smith & Wesson M642 No-Lock | Ruger LCP; 10/22 | Daniel Defense M4V1 | Remington 870 | Alpine M1 Carbine | Steyr M1895 |1943 Izhevsk Mosin M91/30 | Walther PPS