ive got an associated rc10, its fun but most recently i got into 18th scale, its a blast i love this size so much more because they maneuver so well and accelerate soooo fast. this site has a sale right now on the RTR Xray nitro monster truck for $269. www.superfastrc.com

i know you said you want to build it so i would recommend an XRAY M18MT (this is in kit form) and you can build it yourself. i only mentioned the rtr truck above because of the sale price.