I'm running this engine right now... You can't go wrong for the price, I doubt you can find anything comparable for $150US.
I think you'd want a low end pipe for this one, I'm running a midrange pipe and the starting torque leaves a lot to be desired. Also, I find that the engine likes to run hot, around 280 - 290°F during race conditions. I know that's very hot, but anything lower than that and the engine has very little performance. I've got about 2 - 3 gallons through mine and it still has tons of compression remaining.
I recently got a RB and put the SH in my truggy... You get what you pay for. The RB is truely an awesome engine but it costs the same as 2 SH engines.