Old thread, but just by way of update, the decoder was dead and replaced no problem by the retailer. It now works a treat in the 071 in DC Analog or DCC mode.
For DCC, I went with the NCE Pro Cab 5amp system, and so far happy with it. A few software annoyances on the cab user interface, but the overall system does what it says on the tin quite well. The physical ergonomics of the hand held cab is quite nice, combining speed buttons with the optional rotary button. The built in RS232 interface enabled iPhone use as Wireless cabs running WiThorttle app linked to JMRI on laptop plugged into the NCE. The RS232 port, JMRI and WiThrottle has potentially saved me a lot of cash because now I dot nned to buy wireless cabs nor additional cabs.