I rode the board last year for boardercross and it performed very well. While I didn't put a normal amount of stress on it (usually used to 120+ day season out west compared to under 50 her in the east) the days I used it, it was pushed to the limits. No breaks. I've ridden Volkl for a while now and if there's ever been a problem, they've been more than accomodationg in replacing a broken stick. For example, I did a front flip over a head wall and stuck the tail of my board into wet, dense, formerly powder snow. As I continued to finish the front flip, my board did not. Result was a stress crack. Sent it back the next day and w/in a week a new one was on my doorstep. I too broke an air core several years ago, and I must say the newer versions they've developed over the years are much more durable...as long as you're not digging in after front flips
If you don't want to go aircore, you can go for the Wall Pro, which is a full, tip-to-tail wood core (slightly different shape, but I rode one for a few years as my all-mountain board). If you're ok with a slightly softer board, the Sting is full wood and is designed more like the Coal. I think you'll be ok with the Coal though. I'm psyched to ride mine this year outside the race course for a change.