Go with the TMR and the M1 turrets. That's what I did....
My 280 - Updated!
Read the entire post, the optics on the rifle changed a couple of times. The final optic set up is a VX3 4.5-14x40 with TMR reticle and M1 knobs (not sure if I posted a pic of the VX3)
The TMR is nice because the cross hairs don't actually intersect at the center. This means tiny targets at long range are not covered up by the crosshairs. FYI...TMR=Tactical Milling Reticle - so it's in mils not MOA.
In terms of the knobs, I like the M1 because then you don't have a cover that you can lose or fumble with to remove in order to get a quick shot off.
Also, have a 308 with a Leupold MK4. it came from the factory with the TMR and M1. Love it!
My 308 1k Rifle - The Evolution Continues!