RE: Would it be a sin...
IMHO the Aetec is what I would call a "decent scope" but not something I would compare too say a Conquest, 4200 Elite, VXIII, Signature Select etc... Sure it would work fine on the Sako and you probably wouldn't have a minutes trouble with it. I have not yet dealt with a new Master Series. They certainly should be better than present, but the only literature I have read on them is their own.
You are asking about a "decent scope" on a fantastic rifle, at least you aren't asking about putting a BSA on it! If you already have the scope that's fine. If all you can spend is $200-$250 then do yourself a favor and get a Nikon Buckmasters for that gun. They are LIGHTYEARs ahead of the Aetec in clarity, a simple glance through each will bear that out.
Good luck,
RA