i have both maxpower xxl3 and novarossi 353 09. overall i feel both of them are very comparable. 353 09 might have slightly better top end. But, it really depends on the pipe combination you use. I would get the 353 09 because novarossi just lowered the price. You can get one at rc-toro.com for about $359. xxl3 the cheapest i can find is $399