Glad to hear you dumped the snake and picked up a Kyosho.
I don't know much about the spektrum servos, the new spektrum micro recievers work really well. I run JR 8800s's in both the throtle and steering.
All my setups are on the empire website.
The kit car is really good, on high/moderate bite like Toledo and Ft. Myer's you really don't need to do too much to the car.
Kyosho upgrades that I like
CVD's front especially, rears are nice too but not required
SP lightweight 2-speed one way and front one-way, nice but not required
APP Brakeset (must have, best brakes around)
SP belts, all the soft belts are great and improve the drive train significantly
Sirio pipe and header (really nice)
Empire rear sway bar, very nice, expensive, but very nice, top notch stuff
The blade sway bar has alot of play in it
The empire cross brace is nice too, but not required
Kyosho uprades that are nice but not required
Alum front body posts
Mono engine block
Carbide shock shafts
The Parma R10 IMO is the best body out there, the dome is a close second
For the parking lot tracks you might find a few other things handy
Delta rear roll center blocks I believe they are 9mm high
Empire front suspenstion hangars the lowest and longest
Mugen clear shock bladders
Delta Wide Offset front axles
All these things will make the car turn more on low bite, but nothing beats soft tires. We played with really soft fronts all year for the parking lot races, which really makes the car turn.