Fantasy World Hobbies in Tacoma runs races every sunday all summer long about 10min N. of Fort Lewis. 4-seasons is about 20min S and races Saturdays.
The Mugen and Kyosho cars are both great choices. Localy the hobby shops in the area don't stock much in parts for either car but will order whatever you need.
The most popular chassis in the are right now looks to be the MTX3. I race a Team Magic G4S and feel its a better value with comperable performance compared to the MTX4 & RRR. If you sold off your car and motor I would suggest giving Sam @ racedayhobbies.com a call he has a special G4S package where you get the full hop-up car, Serpent Mega ZX-12 engine, Skyline VR-12 plus pipe & a set of Serpent Jaco tires for $600.-