Whatever you do, I recommend you buy one USED. Gun value in my experience is a little like car value. If you buy new, you take a huge hit the moment it leaves the shop. At the very least, buying used from another member here on CGN will save you the taxes, and personnally, I have never regretted buying from a member here on the board, and I have done so many times. Just follow the recommendations for avoiding a scam, which is posted as a sticky in most of the Exchange forums.
The only new guns I have purchased, are the ones I have experience with (for example, I know single stack 1911s are for me) and therefore I count of having them a loooong time and don't mind taking the "hit" to have a brand spanking new one. Many dealers also sell used guns, a reputable dealer will at least guarantee that it works on arrival and will help you resolve any problems with the gun immediately after sale (ie they should stand behind what they sell, even used).