The Agate for me works ok. Ive been using Akura and blitz 60909. As for the Alum chassis I run the no flex CRC chassis both indoors and outdoors. Just got some new spurs to try but it will be awhile before I try them. I also run the CRC tires cut down.
As for the spur gears it really depends on the chassis. CRC car run anything while the Awesomatic 68-70- from what I've seen.