personally,I had a bad experience ( stiff ride quality) many years ago with pro comp leaf spring suspension assembly; but recently I've either read or heard in a conversation that pro comp coils provide a comfortable ride quality. Makes sense to me that any coil suspension would be the best way to go if I was building a CJ-7 or YJ just for the highway. I suspect that leaf springs have the advantage offroad in providing better control of the axles during hill climbs and rockcrawling.

94 YJ, SOA, 2-1/2 Alcans, ARB-front, Detroit-Rear, 4.56:1 gears, Oasis Trailhead compressor, 4:1 Terra Lo, 37x12.50x15 SSR's, 8000 lb Ramsey, & etc.