I agree with Irvin... Babolat makes some really great multi's. I've tried several different high-end mutli's, and my all-time favorite is Babolat Xcel Power. If the price for Xcel Power is an issue (which it doesn't sound like it is for this particular player - since he will be getting free string), I often recommend Addiction - a great string at about 1/2 the price of Xcel Power.
I don't particularly care for Sensation and think all of the Babolat mutli's are better.
Take care.
DH