Been using the DTC-60 for a while now. Was happy with the HT-10 before, but the DTC-60 perform the same (to me) and last longer. I have probably 20hrs on track with one set of DTC-60, and I still have 1/2 the meat left.

As for suppliers, I get them directly from Hawk using contingency money. however, they sell at full retail price. Other than that, I buy them from Summit. I've spent hours looking around for any better deals using our SCCA discounts, and Summit winds up beating all of them by a couple bucks.

That said, I haven't bought from RaceShopper in several years. Had very good experiences with them, but simply haven't bought from them in a while. I'd definitely recommend calling them and checking on prices.