Im not sure how the trails are there but the Stumpjumper is a GREAT FS bike in that EXACT price range too. Lots of my friends here have them, even my uncle at well over 6 foot tall and 270lbs. Beats the piss out of his on some of the most crazy mountain terrains we have here.
Myself I have a Trek Superfly carbon. I enjoy the speed and the climb. Buy a bike for what fits your riding style and the terrain you'll be riding. If you're not riding anything crazy up and down with a bunch of rock, then you could ride a nice trail XC bike of some sort. Most bikes will be 2x10 gearing and a 29" or 27.5" wheel now, some 1x11 coming into the mix too though. How tall are you and what do you weigh? Seeing that you road ride you won't have any trouble pushing the 2x10 or 1x11 gearing for any climbs.
I have over 4,000 ridden miles here on everything from fire roads to down hill rock. Ive rode the different Trek and Specialized bikes during demo days here, they are all great bikes!