The 1x10 setup on my Jet9 works pretty well.
SRAM PG1070 11-36, X9 trigger shifter, X9 medium cage RD, jump stop, 34T SS qrotor chainring, race face bash and (newly) Biocon v.02 chain guide.
For me personally, no lower gearing is required--and I'm fat and out of shape. Anything lower than 34-36, I'm probably gonna' move faster walking anyway. And with the 34-11, I can zip along in the 20's on the flat...
Originally, I was going to go with a mrp bash/guide unit, but it wouldn't clear the lower links on the jet9.
Then I had a modified kedge cross chain catcher on it, but alas, I found that sticks would get stuck in it and bend the light weight aluminum bracket. Hence the jump stop now. Honestly, I don't even know if I really need a guard...especially with the SS ring.
I went with a medium cage RD because I figure that I might want to go 2x10 when I get to Oregon. The Cascades are big.
I just put on a just released biocon v.02 chain guide. Not 100% thrilled on how it mounts to the swing arm of the Jet9 (specifically), but it works as advertised. You don't need this for any bike; I got one because I'm an equipment whore AND I hate the noise made by the chain slapping around through the rocks (too much time on a SS, apparently)--this thing takes care of that quite well.