Just make sure your CCW gun isn't something that you want to baby, or preserve for the next 50 years as an heirloom. Your CCW gun *WILL* Get holster wear on its finish, scratches, etc... A CCW gun only has to be reliable, and accurate; Not Pretty.
I recommend the Comp-Tac holsters, as my family could never tell I was carrying around them, and they never noticed a thing. No significant bulge or anything. With the Shirt-Tucker model it's not necessary to wear a "vest" or untucked shirt, and it fits in quite nicely with office business casual or semi-formal dress as well. It can be used as a normal IWB in summer clothes as well. I bit pricey, but I thought it was well worth the money for mine. YMMV. Check them out at www.comp-tac.com
Sorry, too lazy/late to hotlink; I don't feel like doing it..