with regards to choosing a 4wd:
If you want a straight battery config:
You cant go past the Kyosho ZX-5. Its relatively cheap and highly competitive behind the right set of controlling hands. Parts support is cheap and you can buy directf rom Kyosho America and top shelf online shops like A-Main.
Second Choice would be an original Jconcepts BJ4 (you can always upgrade to the World Spec if you want to go saddle later)
If you want a saddle pack config, then theres a few more choice to be made, as Saddle config seem to be the accepted flavour these days..
So. my pick would be:
1. Yokomo MR-4BX (any version). Belt drive for smooth power delivery, adjustable centre one way and very very Strong car. Only weakness is the exposed diffs... But all you need are some Shadow Antichoke™ covers (available at www.teamadrenaline.net
) and it will delay the next rebuild a lot longer than running it uncovered.
2. Jconcepts BJ4. We all know bout this car, so not gonna dance the Victory laps here. and the guys over at JConcepts ROCKS.
3. Associated B44. Yet to be available, its the production model of the BJ4. Current Worlds winning platform. Nuff said.
4. Hotbodies D4. Proving to have a lot of potential, some say a BJ clone... but its cheap, drives and behaves similar to a BJ and good parts support. Problem: weak diffs.