Roy:
If something happens and you decide to go the Farrell route, my hunting buddy has a 270 AM and uses a Farrel 20 moa base and Farrell rings and they are both good stuff. No problems whatsoever.
Just remember that typically a Farrell base tends to be higher than a different brand of the same moa dimensions.
If you go the Seekins route you will have a great setup though.

