This is a very expensive hobby and I like to keep cost down everywhere I can by keeping things simple. I prefer a coilover. In fact I think that for 90+% of the wheelers out on the trail a 14" x 2.0" coilover is capable of handling everything asked of the driver.
I like the fact is if very hard to make a coil spring fail without something else big failing first. The struts and air shock depend on seals that could fail ending a wheeling trip very fast.
A nitrogen source is needed for both so that is a non issue.
Coilovers are very easy to change valving on about 20 min. once they are off the rig. Once again simple yet fully adjustable by most of us at home or at the trail given the correct tools.
I must say the ORI struts are a work of art to look at. Word is they are also capable of the "cloud of titties" ride as well.
Everyone also says that you don't need bumpstops or swaybars with them. I personally don't feel comfortable trusting a 1/2" bolt as my bumpstop.
On my Jeep 4 link f/r coilovers I don't run a swaybar and have never felt it needed one.
I say go with a coilover, cost less, adjustable, pretty hard to tear up and with a little time they too can ride like a cloud of titties to.
