I used to be a toshiba tech. I have about 8 factory certifications with toshiba products including the CTX lines, In my opinion, if you go with a toshiba, get the CTX670 model, or the CTX100. They are a stable platform to work off of. They are not very user friendly for administration though. The tech. has to be involved in many more administrative functions than with the Merlin, or any avaya system. The programming is more cumbersome, and less pre-configured than with Avaya products. If you go with toshiba, call toshiba direct and get a recommendation for a local dealer to make sure you get a competent one. There are not as many sources of support or service for toshiba localy as with avaya, less competition= less expertise. Get administration training included, if you have an IT professional with your organization. Where are you at, I may be able to reccomend a dealer, if you go with Toshiba. I would however feel more comfortable recomending the IPOffice, or upgrade your Merlin. Previously a toshiba sevrice techs opinion. Good luck, hopefully this is not to late for you to read this before you make your decisions.