Before you bud plunks down his dollars for any of them, I suggest he try each style. I have a 45's in 1911 (12), Star PD, Springfield XD and Sig 220 format. They all point naturally for me. By that I mean I can pick one up, close my eyes, bring it up and it will be pointing with the sights aligned. If I try that with any of my Glocks (10mm, 357/40 & 9mm), I find the sights are high and I have to dip my wrist down. For me, Glocks both large and small frame point high, therefore they are regulated to hunting guns. For a defensive gun, I want something that points instinctively. Just my .02 but something to consider. All of these are good guns, just some are better than others for certain people.
Thaine