Rifle Scopes Is there a better 1-6 mil adj/mil ret than the leup mk6 for 2k$

Yes it does. There have been a few reviews/photos of the illuminated reticle.

Yeah, the thing is most definitely daylight bright. The type of illumination requires your head to be in a fairly picky position however I didn't think it was that bad. I still think its a total package type of scope in its class.

I have not seen the USO 1-8 or the Bushnell. I have seen a CQBSS with Horus however. For the price difference, I'd rather have the MK6. A 1-8 is a little different and depending on your needs may be too much. They are certainly too much money.
 
"Better" will be subjective to your needs and expectations. I have a USO 1-8 and in my use and preference it out shines my MK6 in every way other than the turrets. The USO has a christmas tree reticle so I have no need for turret use under most conditions.