Narco ... the Glock 27 is an excellent choice. May I recommend purchasing a full-size clip as well? When I'm not carrying concealed my G27 is hidden in my car, loaded with a 15 round full-size clip. It makes gripping the weapon much easier.
For carrying concealed I simply replace the full-size clip with one of the small clips which comes with the weapon. Without the clip extender, though, your pinky finger will be floating free when gripping the weapon. Try it at the range to get used to the recoil in this mode. And it's not that accurate beyond close-in distances.
Give some thought to getting a Crimson Trace laser pointer as well:
http://www.crimsontrace.com/Home/Products/GLOCK/tabid/196/Default.aspx
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