I have a few of each frame size. The two 97s are 22lr/22magnum and a 44special, both have 5.5 barrels. The two 83s are 454/45lc and a 475 Linebaugh, both have 6 barrels.
If I were to have only one it would be a model 83. I prefer for a gun to have a little weight to it. The six inch barrel is just about perfect. There is enough sight radius for iron sight shooting and the barrel is long enough to where blast and powder residue will not coat the end of your scope/optics. I also prefer the way a six inch barrel holsters.
If I were to have only one it would be the 475. The 475 is one probably the most well rounded cartridge in existence. A slow moving hardcast bullet doesnt even damage a rabbit too much. You also have power available to hunt elk or moose with much power to spare. Accuracy is excellent from 850fps all the way through 1450fps. You can load the 475 to recoil levels equal to, or a touch below, the 44 magnum or to levels I find hard to believe anyone would enjoy for an extended range session.
I dont see the need to have the 480 cylinder being that you can reload to any level of power you want with the 475. The only thing I might see is being in a pinch for ammo and having to buy 480 stuff and you dont want to void the warranty. Of if it were to be a while before you take up reloading you could have a 480 cylinder and shoot factory ammo in the meanwhile.
If I did not reload or did not plan on reloading the 44 magnum would be my choice.
The 475 is simply a fine round and is my personal favorite.
Peace be with you,
Scott