In general it looks like this:

THREE SEASON
WM Caribou or WM Ultralite
POE Thermo Ether 6 (just got this...still messing around with pads)
Tarptent Double Rainbow or Tarptent Squall (if I want to drop a few ounces)

WINTER
WM Ultralite or WM Versalite
Thermarest Prolite 4 (3/4 length) and Thermarest Z-lite
Hilleberg Akto

I then tailor these general lists to the specific weather conditions I expect to be in.