So far looked at
Oneplanet Overshadow
https://www.oneplanet.com.au/product/packs/bushwalking/overshadow/
- 1.4 KG
- 50 L
- looks robust and comfortable.
- 500D nylon with 1000D reinforcing.
- Good harness. Not the most breathable.. but its robust
- Not sure I like the water bottle holders...
I doubt I can dislocate my shoulders enough to reach.. Why cant other pack manufactures make holders that are set at a angle like Osprey do..
- No hip belt pockets
- Aussie manufacturer

HMG Southwest 2400in the more durable 150D Dyneema black
https://www.hyperlitemountaingear.com/2400-southwest.html#product_tabs_specs
- 870 grams
- 48.8L
- Looks robust though doubt its in the same league as the OP for durability. (though i could be wrong)
- Ok harness with aluminum stays. No back padding sculpted for ventilation. just has 1/2 inch foam pad. Con is very sweaty back etc
- Like the hip belt pockets.
- Water bottle holders also appear hard to reach but atleast they are angeled. (I prefer bottles to internal bladders as I can see how much water i have left.)
- Claims to be waterproof.
- Expensive and US cottage manufacturer so limited warranty options.
- looks cool ! very important

Ive also thought about the ZPack Arc Haul but doubt its durable enough ? Other than that I liked the comfort and features.
http://www.zpacks.com/backpacks/arc_haul_zip.shtml
Does anyone have personal experience with any of these packs ? and used them in scrub etc.. Also any other light weight scrub warriors worth considering ?