When purchasing any tool, don't forget to take in account that you are going to need replacement blades /belts whatever.
I once had an opportunity to buy a 18" saw for resawing. It was nearly new and the price was awesome...the blade prices were brutal so I passed on it.
I would take a look at price and availability for replacement blades for the 12" saw. They may not be available in as many blade models...some places will make them custom.
I would set my sights on a 14" saw however if you can swing it. I have three 14" bandsaws in my shop . One Grizzly ultimate strickly for glass and phenolic cutting, one for wood cutting and then there is my laguna 14" (this is really a big saw) for resawing.
I kind of wish I would have bought that 18" now as it would have made a good mill for cutting up logs and cants...oh well, there will be another chance.
good luck, bigjim