Best brakes for grizzly 09 550/700

Hey iv been in a few situations lately were i have to slam on my brakes (rear) and so far not impressed with em just get a whole lotta slide not enough stop, (yes front ones work waay better for some reason and stop almost instantly) but id rather have the back brakes work the same since i like using them more, so i was wondering if there are some really good aftermarkets that can fix this problem, price is not a problem for me.

Thanks in advance, Ryan