I understand your point, but the Rubicon has the 4:1 t-case as well and if I get it with 4.10s, it should be geared low enough for most of what I want to do with it.
The Rubicon 44 does share the outers with the D30, but since the mid 90s the D30 has used the same u-joint that the old D44s. The only time they are really a problem is when you have the wheel turned hard over and are bouncing a front tire and that's not normally my driving style but I was considering the RCV front shafts for that anyways. ARBs are nice, but if you buy them, decent quality gears and install kits, and a cheap compressor, you're nearing $3k. Then you have to pay to get them installed or spend a weekend installing them yourself and you are left with a tiny D30 ring, pinion and shafts (smaller at the differential).
I used to be a real gear head, but I've gotten to the point that I want to go use my stuff rather than spend all my time building it. I can regear a sport, but I just don't have the desire to anymore. I've spent almost 8 years on my K5 and it's still a rusty old beater that I can't take on long trips or feel safe with the family in offroad. I just don't have the spare time to get into the big projects it needs when I could have my kids out at the campsite or be crawling down a trail.
I've been around off-roading, and cars in general, long enough to know what I want from a vehicle and I think what I have planned will fit the bill nicely. Plus, the Rubicon holds a little better resale value so should I change my mind in 5-10 years, the thing will still be worth $30k and should sell quick.