Thats what I had read in Toms......

He favours the Baracuda for quietness and recons the performance gain is slight.

I notice you have Raid. The mobo will allow me to Raid 0 and I could by 2 x 80Gig Baracudas for the price of 1 Raptor

Is it worth it?

Any thoughts on Vid Card, ie what are u running?