Look for a PROPERLY cut axle shaft - 10 Factory has a great warranty (10 years) and they properly cut their axle shafts so the valley in the splines is the same OD as the axle shaft. If the peak of the spline is the same OD as the axle shaft it will break at the splines - it's weaker.
http://eastcoastgearsupply.com/i-12...ly-upgrade-full-kit-dana-44-71-77-bronco.html
Buy axle shafts with splines that look like these -
36" tires do not warrant RCV's - but if you want the ultimate thing, go for the RCV's. CTM's are a thing of the past with the introduction of CV's. The CTM's need to be greased after each run, have zerks on every cap that must be installed after it is pushed past the knuckle and do not turn sharp and smooth like a CV. The CV's are fully rebuildable, as the CTM's are, and only need to be greased once a year. They do not fill up with water and are rated for freeway speeds. Lifetime warranty there as well.
What you need depends on you wheeling style - whatever you do, make damn sure you have full circle snap rings on your u-joints. I kept blowing ujoints up in my pickup until I got some JBG cheap chromo outers and ground the factory inners for full circle snap rings - pair that with Spicer joints and they lasted well over 2 seasons and eventually failed from lack of maintenance.