Are you now, or have you ever been a member of the Doodie Project?
Good thread on mag compatibility:
http://www.czfirearms.us/index.php?topic=75989.0
Formerly known as xpd54.
The opinions expressed in this post are my own and do not reflect the opinions or policies of my employer.
www.gunsnobbery.wordpress.com
Personally for IDPA I would pick whatever gun you’re going to carry every day. Shoot it in which ever class it fits the best in. You’ll gain a lot of confidence in your pistol and your ability to run it. You’ll also figure out pretty quickly where your weaknesses are with it.
I'm with Gregg on this point ^ and this is what I used to do before IDPA got cancelled at my local club.