Congrats on the Apex
Pretty sure most of the MTN guys went back to stock after trying the Ram Air setup.
Go for cheap weight loss IMHO
-l/w exhaust, TJ's (Lincoln County Customs now) is popular. Or build your own with a slip on off ebay for an R1.
l/w battery (WR 450 battery works good)
l/w rear susp drop brackets
Timbersled or Kmod rear suspension if funds allow
Get rid of rear rack and pick up a craigerbuilt gas thingy if you like to carry fuel. Saves like 7-8lbs for next to nothing.
Simmons skis are really popular but I've had good luck with the stock skis.
Don't know how tall you are, but I went with the RSI pivoting riser, a little more work than I thought to install, but love it, raised my bars about 2.5" and I didn't need a new throttle cable.