FWIW, the blade is the most important part in a bandsaw. The rest is just to keep the blade in place... I believe that most (but not all) commercial bandsaws can be tuned to saw properly, although many will not retain their tuning very long. I also believe that older machines tend to be better built than newer, slimmer machines, as a general tendency. JMHO, of course...and I have more experience with lathes and such than with bandsaws, anyway.
DF