Philospher,
The CO2 tanks are pretty awesome for basic tire work. You can even run air lockers off of them. But they cost about $10 a pop to refill here and you would have to find a place to permanently mount it and it would require connecting and disconnecting lines. It just wasn't feasible for my app. As is the case with anything, what you use is entirely dependent on HOW you use it. I prefer my method due to the fact that once the initial outlay is paid, that's it. It's an endlessly renewable resource for me.
As for the build-up, one day we will have to have a pissing contest just for the heck of it. I haven't put rock sliders or my skid plates on yet since the only rocks we have in Florida are the little white ones you buy in plastic bags. But as the build-up progresses, I will get that way. I just have a plan and purpose for my build-up and will adhere to it no matter what.