I've been using 421 with 800 and telewest tv-drive controlled via the normal din comms (simply on default settings: DVD on 4 and tv/cable on 3 I think) and it's been flawless (I suspect it's about crash on me now I've said that, as 2007 has started out with a set of minor problems including the HDMI output from tv-drive failing for 2nd time).

It's expensive and has a blue led - which flashes if no good HDMI signal is present, for example when everything is switched off - but so far has worked seamlessly.

The look of joy on my wifes face when I explained she didn't have to switch between input configurations on the tv (component and HDMI on same input) anymore made both the price of the 800 upgrade and the 421 almost reasonable.

regards

Chris

Lounge/Cinema, Trinnov, DSP8000XE, 4x 320.2 in-ceiling, M6 rear, 2x DSW.2
Roon Nucleus+ and 320.2 in-ceiling in many rooms (KEF in-ceiling in bathrooms)
Spare: DSP5000, 598, 562v2, 500Mk2, 518, 519, 504, 101B, M3, 861v4, 800 DVD, MS600, MC200