I'm not a fan of the Cusco cage, or the Autopower. Notice where it mounts to the rear fender wells, it's kinda pointless. It should mount further back to the strut tower housing. If you look at my friend Andy's cage. There is a bar welded across connecting the two strut towers, and the back half of the cage welded to that, and triangulated. It actually adds structural rigidity to the chassis.
Autopower has been approved in some sanctioning bodies, but besides drifting I'm not sure who uses the Cusco.
If I were serious about a cage or half cage, I'd find a local performance shop that specializes in it.
http://www.rollcagecomponents.com/ has some good stuff.
Personally I'm leaning towards an Autopower roll bar. The price is only $100 more than a harness bar. I want it just so I can mount a 5 or 6 point harness properly. I may splurge and get a nice half cage like my buddy Andy.