Just my opinion, but I would not get riser blocks to begin with. Resawing requires quite a bit of set up to do properly and a learning curve. If this is your first bandsaw, I would learn with it first before the riser blocks. Depending on the model, a 14" bandsaw can resaw anywhere from 6-12" . I can resaw 6-8" on my 16" Jet with relatively no problems. However, when you get to a taller piece of wood to resaw, it gets more difficult.
Are you going to do a lot of resawing? If you are, then you will also need a thickness planer or drum sander to smooth out the saw marks.
While smaller 10" bandsaw can not do everything a 14" one can do. It is also the reverse. I can do things with my 10" Rikon with the blade stabilizer that I can not do on my 16" bandsaw. It is easier to run small blades and do intricate cuts.
The best advice for you is to decide what you are going to use it for and how much you will use it. Are you going to get into doing a lot of resawing, make bandsaw boxes, general woodworking or what. This will help you decide what to get.