Since I tend to do a fair amount of riding on singletrack, I've been trying to figure out a good platform that will do both gravel and technical trails competently. For a while I assumed a CX bike would be the best option, and it certainly seems logical. But lately I've been thinking I'd regret not having a suspension fork. After looking around a bit, here's what I've been pondering...
Scott Scale 730 cross country mtb
http://www.scott-sports.com/global/en/products/241283008/SCOTT-Scale-730-BikeThat would certainly satisfy my trail urges. And I think if I put together a 29er wheelset (I'll have to check the clearance) mounted with an appropriate tire I should be ok on gravel and fire roads.
The fork has remote lockout so I can eliminate the annoying bobbing you get on smooth surfaces. And I can get the bike down to about 21 lbs pretty easily. That puts it right in line with other bikes I've considered. The carbon frame should be fairly comfortable for several hours of road buzz. And if need be, I can swap stems for the day to fine tune the cockpit, depending on my plans.
The one drawback I can think of is no rack mounts. But a good seatpack could solve that for my needs.
I can think of lots of reasons why I should do this. But tell me why I shouldn't.. or at least why you wouldn't.