$11K = R-19 Rolled batts in walls, blown fiberglass attic to code

$15K = R-22 Asure-R Blown-in fiberglass in walls, blown fiberglass attic to code

$23K = R-18 3in closed cell foam in walls, 6in at ceiling level to code

Because of the numbers, we are leaning towards the Asure-R blown in fiberglass. Foam just doesn't seem to be justifiable. I like the continuous and consistent nature of the blown in fiberglass as opposed to batts.

Will I still need 1" XPS (R-5)or just zip sheathing? Also considering ZIP R sheathing instead(R-6)... any feedback on this would be great as it is a new product which combines housewrap, rigid foam, air barrier all in one product.

What else do I need to be thinking about? I appreciate all feedback. I have been learning a lot about insulation, but still do not understand much! Thanks in advance.

I've found exterior foam board and fg work well in a colder climate. ZIP R resembles Dow SIS but is new to the market and there are many questions.

if your ducts are all in the crawlspace
then foam seal floors, and mastic seal
all ducts,return air, plenum connections, and supply
boxes to floor.

you should have a continuous vapor barrier on the
ground and ducts shouldn't be within 6" of vapor
barrier/ground.

will crawlspace be open or closed??

in the attic air seal all penetrations.
wire & plumbing penetrations, ICAT recessed
lights (insulation contact air tight) not IC
lights, seal oversized cuts for bath and stove
vent fans.
concentrate air sealing efforts at attic floor
to minimize air leakage into living space.
once air movement is stopped, then insulation
performs as designed.

invest in baffles in rafter bays to keep air
pathways clear.
chose one method of ventilating attic.
gable vents
soffit and rigde vents
of soffit and passive vents

best of luck.