my thought....since you dont like the whippiness of a 1A whelen, i'm guessing you would like the balance of the 1-s...and with the 9.3x74 available as a factory offering, i think i'd go that route over a rebore to a gun that already doesnt balace well for you.
as for a rebarrel of the whelen...i'd vote no. find a good buy on the 9.3x74, snag it...if you like it, sell the whelen, and you have less loot tied up in the project that you would by going the custom route.
If by chance you dont like either, keep the best looking one for the build of your dreams, and rebarrel it any way you want.
