Hi.

You have a mountain bike?

Ive always had masses of braking from every brake type Ive had, even inexpensive canti's.

Ive used canti's in mid winter in snow and rain on proffessional level downhills, and found there to be plenty of braking.

V's, discs etc offer more, but it sounds like you have a problem with your bike.

Have you tried taking your bike to a shop to get the brakes proffessionally set up?

It could be something as inexpensive as setup or cables.

Chris