checkout the raptor V2
HERE
I have tried all the cheetah variants and the ASCU's along with 3 versions of the trigger master over the last 6 years and the raptor is terrifyingly good and well up to scratch. U could check out the stealth for a cheaper option but the raptor is by far and away better than any mosfet I've tried yet. big up point is that it sits in yer gearbox with no bulky computer unit at the back.
run 3 of em and well worth the money, easy install as well ;D
AWS also doesn't sell directly to individual customers anymore and canadian retailers will be out for ages yet so u might be a little out of luck. I bought my last one from
www.tigertacticalairsoft.com about 3 months ago but unsure if they'll have any left but stock is usually fast coming back in with em.