TunnelRat hit the nail on the head. A lot of those are pretty good guns, but there a lot of differences there that just boil down to personal preference.
Speaking of personal preference, I always prefer a 9mm over a .40; the slight increase in power doesn't make up for the lower capacity and slower follow-up shots. Add in the fact that 9mm ammo is considerably cheaper than .40, and it's no contest between the two. But that's just my opinion, the .40 is a good round that serves many people just fine.
0331: "Accuracy by volume."