Some of the guys here use the CZ's when shooting 9mm. One of them, don't know the model is apparently almost competitive right out of the box.

Today, IPSC pretty much demands a race gun. I made "A" back in the late 70's with a stock 1911 nickel plated Colt.
In the 80's I bought my own on which I mounted Millet sights, changed out the barrel to a Wilson match bl., numerous links for perfect lockup and ported the barrel and slide. That's it and THEN, was all I needed. today, I doubt very much that I could be competitive.

IDPA is the new and upcoming handgun sport - back to natural combat course where use of your body's concealment as well as concealed carry is worth more than all the fancy space-age-stuff.

I've yet to try IDPA, but want to do it this summer at our local range, where I can use my Colt Police Positive .38 SPL and 4" M29 with ".44 Special" loads and be competitive.