I personally wouldn't buy any kitchen utensil or tool branded with a chef's name. Even if it's a good knife, it's likely not to be worth the money you'll pay for it. When a chef endorses a product it just raises the price tag for the consumer because the manufacturer has got to accomodate the chef's paycheck.
If you're comfortable with eBay, check out the following link. It's a set of Wusthof Grand Prix Knives. A little over a year ago Wusthof rolled out its 2nd edition of Grand Prix knives, and stopped manufacturing Grand Prix I knives. So, when you can find 1st edition Wusthof knives they are usually very cheap. The Grand Prix chef's knife I bought retailed for around $120 originally, but I got it on clearance for only $59 due to the new Grand Prix II knives coming out last year.Wusthof Grand Prix Knife Set
However, what I would really reccommend is hunting for a Grand Prix knife at a local kitchen supply store, or Williams-Sonoma or other kitchen retailer, on the off chance that they are still carrying Grand Prix knives, or maybe are able to order them from a company warehouse. I think it's very important to test drive a knife to make sure it feels good in your hand. Some people think this is not important. If the Wolfgang-Puck knives feel good in your hand, that's probably a good inidicator that they might be the right knives for you.