I'm looking to get a new MT. bike and most of the trails I ride do not justify a full suspension. I also want to compete next summer and perform well for informal time trials. I know a hard tail is the most efficent ride I can have but it's killing my back.

I guess what I'm asking is " Do any of you own a soft tail Mt. Bike? Is it durable or high maint? Is it worth the extra $? Is it all gimicky or the next great thing? "