I've been running my used Currie steering longer than the previous two Crown HD steering kits combined. Currie may cost more upfront, but how many other "lesser" kits and pieces will you burn through before you paid for Currie?
With regard to the RE steering, the immediate thing I see is that the tie rod ends are straight, rather than bent to accommodate a 4" lift. These bends on the Currie steering are there to re-align the range of motion of the TREs. The RE will droop into bind long before Currie will.