top rated 2 way remote alarms

Hi everyone, newbee here. I currently have a 99 Chevy Silverado xcab Z-71 (auto w/5.3), looking for a 2 way remote system. The Viper 5900 sst was recommend along with a crime stopper 2014 dp by a local who sells them, he says just as good as a viper 5900 and has a mile rang as well but comes with two remotes but i'm suspicious as I never heard of the Crime Stopper and it sells for around $70 less on the net. I can order anything on the net and he will install for $145. I also heard good things on the clifford g4 and a ravelco ?(sp). My little bro likes the Derringer but I think there out of biz. Don't really want to pay more than $200 on the net for the alarm alone, i will pay extra for the bypass module. What do you guys recommend.

Thanks for the help

Andre