I've never really considered weight to be too much of a problem when doing overnighters or multi's but now that I'm starting to do more solo adventures (I no longer have to carry food and gear for 2...well not until the missus gets back from Nepal and Bhutan), I'm starting to see the light in lightweight gear. What I'm looking for is recommendations in shaving some weight.
My normal pack weight including food and water is around 15kg to 20kg but this is when I'm normally walking with the missus and I usually carry all our food, jetboil sumo with fuel canisters, mine and her tent (she has a MSR Hubba Hubba) and the good stuff (wine and whisky).
I'm not a warm weather walker. I like the colder and wet climate so it generally does mean more weight but I would also like to shave off more when walking from hut-to-hut when I'm in NZ and when I do 3 Capes in October this year.
My current gear list as it stands:
Sea To Summit Duo - it's light but terrible in wet weather conditions. Including UL tarp it totals 1681g with the groundsheet
Mountain Designs Travelite 330 - not good but I've had it for quite a few years when I got it on special. Never weighed it but MD website says 920g
Lowe Alpine TFX Cerro Torre 65:85 Backpack -2720g
The North Face Aconcagua down jacket - 513g
Sea To Summit Poncho - It doesn't breathe but it does the job. 230g
Mountain Designs Sleeping Mat - 680g
Ideally...what I want to do is cram as much as I can into my Osprey Manta daypack but I'd be missing out on a lot of creature comforts and then some. So I've been considering the following for future purchase (or already have...well my wife owns - she's a fricken gear junkie).
Tent: I'll keep the Duo for now but so tempted to borrow my wifes Hubba Hubba or buy a Hilleberg Soulo 4 season when I'm not going hut-to-hut
Sleeping Bag: Looking at the Sea To Summit Spark SPIII or Exped Comfort 800. TBH...I hate mummy-shaped bags but we're talking weight here. I do like this bag though
http://www.paddypallin.com.au/nemo-noct ... 29718.html 
BackPack: Osprey Exos 58
Jacket For Warmth: I'm a little torn here. Toss-up between Outdoor Research Floodlight (waterproof with 800+ fill goose down) 600g or The North Face Thermoball 375g
Rain Jacket: Outdoor Research Floodlight (waterproof with 800+ fill goose down) 600g or Arc'teryx Theta AR 485g
Mat: Exped Downmat UL 7 LW 810g
Any recommendations? Just remember, I rarely walk during the warmer climate and do most of my walks during the cooler climate. My normal walking boots are quite heavy too. I mix it up between my Scarpa Kailash or my old SL M3's