sounds sort of similar to the super sport class over here with the exception of the two seat part. It is a great class that I am looking to getting into here. The nice thing is that racers do not need a lot of money to race since the motors can be run with manufacturer's warranty (no changes) so if you blow it up, you can exchange it.
I was talking to a guy that races this class yesterday, and his opinion is that the fitch, johnson and yamaha are better motors than the merc by virtue fo the merc having a "hard" rev limiter and the others being soft allowing you to push a couple hundred more RPM's out of them. I think he said the johnsons are better for the longer courses, the yamaha better for the midrange courses (but i might have that backwards). Anyway, he has not run a e-tech yet, but looking forward to it.
BTW, I am a die hard merc guy, not bashing them, just passing along the info.
Here is a promotional video done a couple years ago for this rthis class.
http://www.screamandfly.com/video/ss_promo/ss_promo.wmv