Someone earlier said it best: go to the store and handle some guns to get a feel for them and what feels good in your hands. Learn as much as can about the vast variety of options that come with guns. I also reccomend you take a trip to a gun range that rents pistols and shoot a few BEFORE you make your purchase. As with most of the responses you have gotten I too own a Glock 19 that is my carry gun. I keep a 1911 45 in the rouse and also as a range gun. Joshua
SIG Pro 2022 or SIG P250.
I don't think you can go wrong with a used Glock 19. Don't own one but carry a Keltec P11 in an ankle holster or a Bersa Thunder High Capacity when I carry 9mm. Bersa, for the money new under $400 cannot be overlooked.
At the Ft Wayne show check out ZX Guns from Goshen (usually have red table covers), 21st Century from Bluffton, and Ranger Supply from Ft Wayne.
If you can find a Glock 19 for $400 OTD, then get it. If it was my only gun, that would be my choice.
To add another choice to the table, CDNN has Smith and Wesson 5906s for $299. Built like tanks and uber-reliable.