There are beginners and experienced folks in all Divisions in USPSA. You can find a spot in any of them, Limited, Production or even Open. The biggest question is cost for a lot of people. The SP-01 works great in Production Division and shooting steel matches, but not any other division because of the 9mm caliber. The CTS when it comes out will be a custom gun, definitely not legal for Production. It will also be in Single Action, like the TS which rules out Production. The nice thing about Production is you can get all the equipment to shoot it for about $1000.00 and be on par with what the top shooters in the world have (SP-01 $850, 4 spare mags $64, belt $55, holster $60, mag pouches $120ish). And that is all top end gear. If you go with the CTS you'll probably be looking closer to $2000.00 when all is said and done.
That said, Limited is fun also. High cap mags, with a gun like the CTS would be a blast to shoot. You've got an XD40 now. Buy some Arredondo extensions for it and try it in Limited. In the meantime, pick up and SP-01 and come play in Production.