Bi-Amping 2 Interconnects or Y Cable?

Hi there I am about to buy another MF-200 amp and I was wondering about using a Y Cable VS. 2 Pair RCA's.

Obviously a Y Cable is cheaper but will I have any issues come with using it VS. another Pair of RCA's as I cant really ever get around to buying cables in the first place.

Also does anyone know of a good highend Y Cable?

Thanks as always

Toby