I bought one of the SubZero peltier kits and whilst it took a while to settle, my lazy o'c'd XP-M never goes over 36 degrees, even when running Prime or S&M which surprised me as the Subzero was well slated out there.
It is very stable and not so quiet though but thats mainly through the blo hole fan making a heck of a noise and the current kit includes a 6K RPM fan as well as the standard tango fan.
AO