The exedy shouldn't be that much different in price. Actually, when I was shopping around, I talked to someone directly at CoxImport and the guy gave me a deal on the Exedy...cheaper than how much they usually post online. So I'd give that a shot...a call definitely wouldn't hurt.
There's no reason why a "clutch specific" place would be any worse than the dealer. In fact, I'd trust their experience over the dealer's...they probably do more clutch replacements overall. Plus the price of labor is WAY cheaper.