This sounds a little spammy but I’ll give you the benefit of the doubt. 🙂
Since you didn’t mention I budget, I’ll assume money is no object. In which case, take your pick from this year’s list of the best mountain bikes:
http://www.singletracks.com/mountain-bike/reviews/best.php
If it were me, I’d pick a Salsa Bucksaw–it’s the most versatile on this list in terms of wheel sizes and trail uses.