For starters I have no experience here but I'll comment because 1) you're asking, 2) love your rig and kept it on my radar in case it had it was still for sale in 4-6 months

and 3) I want to SAS my rig in the future as well...at least I think I do lol.
I vote for a modified version of option #2, which is SAS it and sell the CI front diff and rancho for dirt cheap to me

lol. For real though, SAS it and part out the IFS stuff to re-coupe costs of the SAS. The rancho I think you could sell for $2k+, probably even $3K because people are desperate out there for a bolt on H3 lift. I too worry that SAS will lessen the ride quality, at least not without dumping alot more money into it.
Couple of questions....
1. Do you intend on doing the SAS yourself or having a shop do it?
2. Any idea what rig you'll pull the solid front axle from? I imagine that depends on if you end up needing a D44 or D60
3. What width for the front SAS do you plan on going with, stock to match rear?
4. Will it be leaf spring or multi-link? For future upgrades and increased comfort/cost I think you'd want to go with multi-link?