Er... Are you a RIFLE loonie or a CARTRIDGE loonie?
Seems like picking the cartridge then trying to find the rifle is backwards except in the case of the 300SAV where you picked the 99 already. Why not go forth and see what you can find in rifles in cartridges you want. OR you could even find the right rifle and rechamber. Or are you going to build from scratch anyway so then the cartridge comes first?
Anyway I would take any of your choices with the limitations you listed in a nice trim rifle, it would only depend on which rifle tickled my fancy.
