Id get the 4.5" Rubicon Express lift, some 33" Goodyear MTR's(I love these tires, they are awesome), and buy a set of axles from 4 cylinder jeep. This will solve your lift, tire and gearing problems. You will have great amounts of flex and with 4.10 gears, you will have plenty of power and a good crawl ratio. If you ever go up to 35's, you can add a 1" body lift and get some TJ fender flares. I have 6 cyl 5 speed with 35" MTR's and 4.11 gears(yes, i got these axles out of a 4 cyl YJ) and have full use of 5th gear, even up hills. Plus I can go slowly on the trail.
92 YJ 4.0L, 35" Goodyear MTR's, Rough Country Suspension