Its your dollar....the benchmark that everything is compared to is still Novarossi.

Sirio is also doing a great job...the others have catching up to do. Its all about personal preferance and available $$$.

OS - still underpowered but the new engine is a big step forward
Mega (Serpent) - Great motor but hard to tune and some conrod issues

I wouldn't venture outside those 4 manufacturers. The Axe Rossi's that I have seen have been very dissapointing compared to the above mentioned. They may get better with Mario Rossi going there but that will take some time.

John