It is true that R+R and ADP do have specific chip sets in their printers but that doesn't mean you cannot use them on other systems. For example the AMT535 on a R+R system can be converted to an ADP 80LQ or a forms printer for an open platform by simply switching the intellicard for less than $600.00. The ADP400 printer must be exchanged for TI8920 which can be used on a R+R system by changing the existing internal emulation to a TI880 upon setup. And both of these can be used on an open platform by downloading the drivers, for AMT go to
www.amtdatasouth.com and for any older dot matrix just use the generic print driver.
Regarding "ROI" the best investment you can make is a few minutes of your time, by going through your monthly maintenance bill from your DMS provider. Often you will find you are still paying maintenance on equipment and support you no longer use. While you're at it, add up the total you are spending on printer and terminal maintenance, it's less expensive to buy a spare and drop the maintenance and you can depreciate equipment. Lexmark Optra printers that were on PIF boxes can be used as slave printers on PC's or can be shared by installing a network card. There is a company in RI listed in the suppliers page on this web site under "computers" that can help you out, give them a call. Regarding which system to choose, do you really want to change your entire infrastructure or just get the most out of your system and reduce expenses?