What are you planning on using it for...Home/personal defense, carry gun, range gun...the more you tell us about your needs, the more we can help...
Hit up a local gun shop and get your hands on a few, see what feels most comfortable to you.
Some shops have ranges for 'test drives', see what you like best...
There are tons of manufacturers, most of them make quality stuff...see if you can narrow down your choices to a few.
Good names are Springfield, CZ, Beretta, GLOCK, Browning, the list goes on...