Lloyd is right about accurate and pretty, and states in his first sentence the sole reason to have one.
I think with #1's, you either love them or you don't.
I have a 1-V and a 1-RSI, both accurate and pretty.
My personal preference is to move toward shorter guns, so a 1B may not be for me.
If you love the way it looks and if a 300 Wby suits your caliber needs, buy it and you will not be dissappointed.