There's nothing wrong with running an ultra lx pro if you're planning on having a ton of fun with an R/C car. You can expect speeds in excess of 50 MPH. I know that alot of 1/10 nitro sedan guys (I'm also one of them) will point out that their 1/10 scaler will also run that fast. The nice thing about the 1/8 scale is how much faster it gets there (on and off-road).

Have fun,

i8tweety