Tim: track days are not too bad for tires as long as you keep them full of air and don't overdrive the car.

For a DSM, in my opinion, you need significantly upgraded brake pads (or a bigger set of brakes all together). My first track day I ran hawk HP+ and they were just barely good enough, but for the same $ you can go to one of their new race pads which have no problem (at least at my power level). With proper pads, they last a LONG time because they are so hard, but they aren't cheap. With regular street pads I would guess you'll melt them in 1 20 minute session.

Funnily enough for such a heavy pig of a car, on stock calipers and brembo blanks with a set of race pads (and freshly bled elf fluid) in I usually have no problem braking with, or out braking, just about anybody in my run group. And I have to slow down more to make it around the corners too!