John,
I had a Roland E80 and did like it. But, as mentioned above it was to heavy for me to carry around. I also own a Roland BK-7M and can attest to how nice the styles are on it. For a simple, easy to use system I would opt for the E80 if the price is right. With the BK-7M you have to deal with all the midi setups and the module is not exactly easy to control from a controller.

Deane