Just a thought is to buy an M&P, XD or Glock that is milled for CO. Get your mags and a red dot. Try it for a bit and if you like the dot and want to try open you can buy a quick drop in barrel and comp from Carver Customs for around $300-$400 bucks. It is the cheapest way to try open or CO and see which you enjoy. If you buy a CR speed or Ghost race holster you can adjust it for CO or a comp easy. With this setup you could shoot limited, CO, or open for a little over a thousand bucks depending on how many goodies you want after that. Happy experimenting!!!