glock 22 gen 3

hey I'm new to the handgun community as far as owning goes. I purchased a glock 22 yesterday and I love it. I came home to realize that it was in fact a 3rd gen , not a 4th. I'm kind of pissed at the dealer becuase like buying a new iPod or phone, you would think you were getting the newest. I...

Look to purchase my first gun. I have my choice narrowed down to three guns: 1. Glock 22 Gen 4 2. Glock 22 Gen 3 3. Springfield XDm 40 I know the legacy of Glocks, but have heard mixed reviews about the Gen 4's. I heard the XDm are very reliable modern handguns. Any suggestions, pro/cons...