Ok... I need a top notch engine, after a lot of search I ended up with these three as the more powerful.

RB XENON ALPHA was an option but RB claims that the C9 is the most powerful engine they ever built and it's 2009 model.

The Novarossi Flash has some incredible specifications, 2.9hp and 46.300 rpm max claimed

The P9R I know that is a reliable and powerful engine.

And...shall I consider the OS VZ-R??

So people.... what whould be your choice, if money is not a factor!