Hi,
I just want to add my support for this comment. I have been a guitarist for 50 years with some minimal keyboard capabilities. I have been using EZDrummer and EZKeys for a while now and love both products. I also invested in an EZMix bundle which is not as impressive as I had hoped. I use Cubase 7.5 which has so may great music creation features including some preset mixing solutions similar to those in EZMix.
However the biggest struggle for me is getting a really good bass line to go with any music I create or covers I am playing with. I have a midi keyboard and a Roland guitar synth. Playing bass with either of these is not very effective as the Roland is touchy and doesn't play like a real guitar and a keyboard cannot be played like a guitar.
I have tried Amplesound's MIDI Guitar product. They offer Bass solutions but to be honest you have to be a good keyboard player to use them. They intend to add bass rifts to their product soon, but based upon my test of their guitar product I suspect it will be very limited.
Having a EZBass product in Toontracks portfolio would be awesome.. I have nothing more to say about that, Your system is the best and adding bass guitar to the mix would be the final step providing us with all that we need. I hope it is in the works.
RG