hawk Blues, as others have said will be hard on rotors, make noise and feel terrible when cold. When at operating temperature are very good.
Probably best to drop back to Hawk HP Plus or HPS, whatever they are calling the more street orientated compound now. I am more used to ordering the HT70 and 10 racing compounds
As for best place to buy Hawk pads, go to
http://www.hawkpadsdirect.com I buy all my pads through them. Last lot I bought for my NA6, was 2 sets of front and rears with postage for the same price as local suppliers for one set. Only downside is the wait, can take 4 to 6 weeks to arrive. Pads for Wilwood dynalites are about $350 for a 3 sets with postage, so $100 a set of pads and $50 postage for up to to 3 or 4 sets depending on size.
Prices maybe out a little as the dollar has dropped since I last bought pads, but will still be near half price of local suppliers.