Mainly do XC that can get tiring with the uphills. But the bike is down to you and your terrain. I have a Bianchi Grizzly hardtail that is getting a bit old but that is my main ride. Last sunday I loaned the Bianchi to a mate and I rode my 92 Kona Explosif. My terrain does not require Full suspension and unless I was prepared to get one of the top end models- I don't think it would be worth it.
BUT- The beast- Boxer Race Forks- Full downhill spec Mavic rims mated to Hope Bigun hubs with 36 spokes. Hope Disc brakes with 200mm discs front and rear and All the parts up to freeride spec or higher. That thing goes and had a price of around $8.000 to build up from a Cannondale frame. Only problem is the weight at around 55lbs in ride trim.
And that bike is the third in line on one of our offroad jaunts.