Airride vs. Coilovers

[214Chevy]

Guys, change of plans on my Chevelle...maybe. I am now considering fabbing a custom frame (not me, but the shop doing the work, lol!!). If I do, I am strongly contemplating using dual adjustable Shockwaves with the internal ride height sensors built in on all four corners. Can someone with knowledge of the ride and feel of Shockwaves give me some insight. A little input on the frame. It will be built out of 2x3 square tubing and I will use all my current parts I have now...the Global West and Hotchkis stuff will do just fine for me. Don't want to buy anything new since the stuff I already have is good, quality stuff (see my build thread). I know Art Morrison is coming out with a direct fit frame for my car, but @ $14-$16k, that is not only out of my budget, but out of the question too.