well here are my goals. maybe that is an easier way to go about this.
lighter than my Sub kilo 20, good to 40s (summer temps NH/VT), fairly inexpensively?
so far i've thought of
5yd M90 folded, tapered, apex
5yd M90 folded, tapered, 6oz down
2.5yd m90, 2.5yd 1.1 ripstop, all sewn, tapered, 6oz down
5 yd 1.1 folded, tapered, apex
(folded meaning i don't have to sew the head seam)