Assuming you want to run in either Production Division or SSP & potentially ESP for IDPA:
- CZ -SP01 - can be run in IPSC Production Div. out of the box. For IDPA you'll need to make weight limit of 39 oz., then it can be used in SSP and ESP- some of them make it with a change of grips, but some need work. I changed my grips to Marshall grips and had to mod my rear sight to make weight. Good guns that are competitive in both sports, but if you plan on running it mildly hard, keep in mind it is going to go through parts - slide stops seam to be the achielles heal of the CZ family. A CZ-85 would be another good choice for both sports and could compete in IDPA with no modifications, but looses the slight advantage of that extra weight up front. However, the CZs are all steel, so likely a poor choice for your weight criteria - still, it may be worthwhile trying one on for size if you can.
- STI GP6 - Fantastic little 9mm that will be competitive in both sports out of the box. There have been some reported issues with breakage, but the manufacturer and dealer support is top notch - buy with confidence in this product.
- H&K P30 - Good choice for those looking at a top notch service pistol. H&K reliability will run in Production / SSP and ESP no problems.
A USP is another good choice if they suit you.
There are a host of others of course, but those are my top three picks to run in those divisions of each sport.
An honourable mention would go out to a Sig 226 E2 - that should get some attention too.
If you are considering Standard or ESP or CDP or Open, there are enough divisional differences to warrant different guns with the exception of maybe running an STI Eagle in both ESP and Standard...but that is a whole different discussion.
Good luck with your decision!