yeh sorry peeps... shoulda made it more clear.. it is for an rb26. to be honest i haven't priced either through my supplier, but have just done some internet research, and the ross ones seem to be atleast 300 cheaper then the ati. i don't intend to make 1000hp, i won't push it much further then 500@wheels.. and i know of plenty of cars still using the standard balancer at that power(if its good enough for 2BNVS to make 600rwhp, then it'll b ok for 500!). but... my engine didn't come with one.. so its just an excuse to buy a better one ATI seems to be the go, but if the ross is substantially cheaper i think i'll go with that. thanks for everyone's 2c. muchly appreciated