I have the Cx4 Storm 9mm. One major con is the stock trigger has a lot of pull to it before the trigger actually engages. You can pull the trigger back then it will stop, then you pull it back even further and then it will fire. Since your budgeting around 1k for it you can go ahead and get the sierra papa trigger kit and eliminate that problem. The stock sights I feel are decent enough for up to 50 yards(haven't done any range time with it out past that) plus it has a rail system so you can put red dots, grips, lights, lasers slings, etc. I like the fact that you can reverse the controls for lefties from charging handle to ejection through mag release and safety.