If physical drawbars are not a neccessity, then get the software based B4, from Native Instruments. It's SOOOOOOOOOO close. It has every little character from the real "B", and fits inside your laptop or home pc. The drawbar settings are changeable in real time, it's just tough to do on the fly. You can assign presets, though.
As far as hardware goes:
The Roland VK7 has been repklaced with a VK8, so the older ones should drop in price about now. The newer one has drop-down key fronts, and NO cheezy orchestral voices this time.
I had the Hammond XK2, and loved it.
The modeled organs in the 9000pro from Yamaha were also topnotch.