Use the same as the three phase one I presume is fitted now. You could go up in power by keeping the frame size the same and getting one with an L suffix (longer)
I would not deviate from the design frame size as you will get all sorts of mounting/adjusting and shaft diameter problems.
Thanks myfordman. I have the bandsaw waiting for me to pick up so I'm not entirely sure of the 3phase motors wattage at present.
I'm a little confused about the LSuffix you mention. Pardon my ignorance I'm pretty amature when it comes to electrical stuff.
When you say I could go up in power but could have problems with mounting, do you mean that a larger motor might not mout easily on to the bandsaw frame?