bi-amplification

[cembros]

i am about to pick up the polk lsi surround speaker set. Each of the speakers have a max output of 200 wats. I am using a sony da 3300es receiver which outputs 100 watts per channel. I was looking to bi amp these speakers with another amp that outputs 100x5 and was wondering if this would be a good idea? what advantages i would see? and what amp i should look into?