Don is right... if you can make it to the
Orlando Show, that will be the best thing for you. The show is going to be small, but that should give you enough time to spend quality time on each printer. Check out
www.issshows.com for more info.
Also, check out this document -
www.multirip.com/dtg101.pdf. This will help provide you a good foundation to understand what you need to look for in a
dtg printer to match your company's needs.
You can also check this link out for why some of the people bought the machine they did -
What DTG machine do you own and how did you make your decision on it 
.
Good luck with your research!
Mark