How big of a guy are you? If you are small waisted it would probably be a better concealment choice to get the compact. If you have some size to you, a full sized grip won't be hard to disguise. Just my two cents. I have a full size 3.8 and love it. I don't carry concealed, though. I just never went through with the background check and paperwork after I took the class.
Join the NRA! Stop the Brady madness!