Bushwalk Australia

I'm lashing out on some new gear for next year...2 X Gossamer Gear Mariposa, ZPacks Triplex and ZPacks 20F double sleeping bag. I looked at the ZPacks packs but the Mariposa seems a better option. Any advice on these products and sizing for myself and my partner. I'm 5'11" and Bridge is about 5' 6". Thanks.

Measure torso length and set up this way - measuring starts at 2:28