Just wanted to update... It's been 2 years, and about 5000 miles (hey, I don't take many long trips in the Jeep), and I can still definitely notice how much better the ride is with these springs. I -do- think that it took a while for them to "settle" and get to their current cushiony goodness.
Haven't gotten around to new shocks, still running the old Rancho 5000s. Hopefully will swap them out soon though.
My OME 2.5" lift parts list with before/ after pics: http://www.jeepforum.com/forum/f12/about-order-ome-lift-kit-1489830/