My partner and I perform with all hardware. Ive never really crossed into the software realm. Im sure theres a milion more things that could be offered with software, but hardware just proves to be more fun and interactive to me.
As for the TR-707. I had one but ended up selling it, (for quite a profit I might add.) My intentions when i got it was to have the circuits bent, but i just didnt get around to it. It didnt prove to be beneficial to me outside of that. However I have heard of people using it as a triggering device for external gear as opposed to a sound module. But then again im not big on controlling all my gear from one piece of equipment. I like interacting with each piece.
blah, blah, blah......rant over
Jay