I only have 1 .40 cal pistol and it's a glock 22. Figured it would be convenient to hold on to in case of riot like Baltimore. NoPd officers carry the glock 22
Para Ordnance p16
Magnum Research Baby Eagle (steel non rail) 40
Glock 22, 23, 24, 35
Smith and Wesson 411
Kahr K40 and CW40
I mainly shoot the glock 22. I do not find the 22 to feel much different than the 17 during use. I do like shooting the para and the baby eagle, both all steel guns. Not much time behind the 411 (I have 2, were purchased as modding projects) or the kahrs.
I had a Glock 35 I used for IPSC before production class came out. It was a great gun. I do t own but have shot a friends duty Sig 226 in 40 and those are great too (Sig 226 and 229 40's can be had from CDNN for mid 400 range just ship to your dealer) I have a Sig 229 in 9mm for duty currently and had a 220 45 acp and Sigs are pretty hard to beat. The S&W M&P is a good choice too.