Trebor (or Robert...whatever)
I have used the Atomics at RCE, Rte 106, and ETMR and they work very well at all three. They will work better on a more loamy track than RCE but still do quite well there.
Tires for Massachusetts Tracks:
ETMR: Panther K2's, GRP Atomics, Crimefighters or Bowties (m3) when it dries.
RCE: Crimefighters M2 (or M3 when it dries), Atomics on a fresh track layout, (Cubics if you have a ton of $$$ to spare)
Rte 106 (new Hampshire): Panther K2's (extra soft), Atomics worked awesome here in the main (which was at about 9pm in October = cold/damp)