Just a few random thoughts.
One thing you need to know before deciding on a bandsaw is what you are expecting to do with it. By knowing that you can then decide what specifications to look for and which models meet them.
Are you going to do resawing? If so how tall of board would you like to do, maximum height wise? Bandsaws like the shopsmith give you about 6", some saws have extenders which can be added at a later time the will boost that to say 12" or 14". You can get saws with 18" or so but they will cost you, and then there are saws that are designed for just resawing....
The distance between the blade and the upright determines how much flexibility you have when doing curves and complex cutting. This is also how most bandsaws are measured. The greater the distance the more the flexibility. A 10" bandsaw is quite limited, 12" is better, 14 is a lot better.
Things like table size are also worth noting but the above two are what really count at least as far as I'm concerned.
I have a 12" bandsaw I have had since the early 1970's and a shopsmith one which I got used during this past year. I really wanted a larger rather then smaller bandsaw but when I was setting up a secondary shop 400 miles from home I found I really really missed having a bandsaw. Since I had a shopsmith in that shop it seemed to make since to add a shopsmith bandsaw. I was able to get a used one for under $100 then did a number of upgrades and have it to the point it is working better then I expected. It still has the cast iron top and I don't think I personally would do that upgrade but all of us see/use things differently.
My preference would be to have a 14" saw with resaw capacity of 12", I would expect to pay under $1000 but not by much to get a new one which is what I would buy rather then a used one in this case. Likely hood of that happening maybe 2% due to funds and shop space, but I like to dream.
One more thought, buy the bandsaw is only part of the cost. Remember me saying I paid $100 for it, well I'd have to guess I have put more then $100 into it for the repairs and upgrades. Then there are the blades, I have one "cheap" blade at about $12 then a woodslicer for about $37 and two timber wolf blades $42 or another $91. Slippery slope this woodworking.