I don't think this is an "RTR crowd."
Personally, I do run RTR, that is how I got back into the hobby...but I think most folks here at IW don't run them...
As to your comment about the circus circus, etc. I think folks would need to know a little more info to know what would be competetive. "Circus circus," I believe would be more of a paint scheme than a hull. As to the tunnel, that could be anything from a Dumas hot shot with a K&B engine, up to something A LOT more competetive.
If you did get a recommendation of a sport hydro here...it would probably be a PT, or WL...or some other hull I don't even know about yet. You would probably have close to $1k into it by the time you were done assembling it, if you got everything new.
Some else here might know of a place that is building RTR, or ARTR sport 20s that would be more competative than a MV. BTW, a stock MV...with a little tweaking on the hardware would be running about 35 MPH in its stock form...if that helps you any. With a .18 CVRM and/or some hull mods, it could be anywhere from 42-48sh MPH. On the other hand, a WL with the right engine...would probably be more like mid to uppper 50s for speed. I would imagine a PT would be about the same.
Sean