Off the top of my head, the lightweight gear I would recommend (compare it to the weight of what you have, then calculate cost per ounce to upgrade). These are likely the areas were you can reduce the most weight.
Shelter: Seek Outside Silex (you should have trekking poles anyway) $209
Pad: NeoAir Xlite NXT $200
Bag: Marmot Phase 20 (it is tight, I hated mine and got a quilt, gave it to a friend and he loves it), or Enlightened Equipment Revelation (or Enigma) 20 degree quilt. About $350 for any of them
Cook system: Toaks TI pot and Soto Wind Burner stove (MSR pocket rocket is cheaper)
Find one of last seasons Rab Electron Pros for a puffy jacket ($220ish)
For water, I use one HDPE Nalgene, but a Powerade bottle will do, and two 3 liter hydrapak bladders with a hydrapak filter. Don't carry the full 6 L all the time, but having the option if you must drop a thousand or more feet for water is nice. Some ridge systems have plenty of water, and some are pretty dry.