Personally I like the CZ Shadow. I thought about an M&P, but the mag disconnect safety is a problem, and the only models easily available in Canada without it -- the Julie Goloski and Pro editions -- are not much less than a Shadow.
For IPSC production, you'll need to drop the hammer and fire the first shot in double-action. If the former bothers you, either grab one of the special edition M&P's or get a pistol with decocker (CZ Tactical, SIG 226). If you'd rather fire in SA, look at an STI Spartan in 9mm, or a STI Trojan in 9mm. The latter is better w/FO sights, but a bit more expensive.
-- L.