I don't follow the price logic in the OP - in some cases you are giving yourself the donor for free and selling it, in other cases you are charging yourself for the donor.
I have had a positive experience with JES. I would go that route happily, but I have no experience with recent ER Shaw barrels. The 7lb weight would be an asset to me, not a detriment. Of course everyone's looking for something different.
As others have mentioned, I would rather have a CRF/open trigger action in a 9.3x62 rather than a 700. But it sounds like you've decided what you want.
