Quote Originally Posted by Psycho
Go with the Glock, the barrels and clips are interchangeable. No need to buy a new gun if you wanna shoot a different caliber.
Here's a site with good barrels in case any one was interested in changing to a different caliber.

http://www.topglock.com/category/101...k_Barrels.aspx

I think you have to stay in the same family of frames though. The 9mm, .40 and .357 are interchangeable with each other. While the .45 and 10mm barrels are compatible with each other.

Modular hand guns FTW.