Well. Personally I am a VERY small operation and got a BN-20. I kinda want to upgrade to a 30" machine now -__- boohoo... but really I just don't currently have the volume to justify that. I'm just jealous of other people is all
Do a lof of research and look for machines within your budget, once you find a few THEN dig further to see what will actually suit you better.
Google is awesome, and so is the search feature on this forum
if you need more exact pin point details (i.e speed of printing etc) then just ask that
I always tell people I can help them best when they provide me with the MOST info... otherwise you find yourself getting more questions than what you thought you actually needed to answer... things like:
what do you want to be able to produce?
How quickly do you want to produce it?
how much room do you have?
what is your budget?
are you doing this 100% of your time? or just part time?
and so forth and so forth... best to give more info if you are looking for details.