Well, I have finally taken the plunge and 'gone DCC' - I have one decoder (a Lenz Gold), with a Lenz LH100 handset and LZV100. All is working hunky dory, though I didn't realise that the programming track needed to be connected to a different output to the main at one point (!)
I have even reprogrammed the decoder's address :-) and changed it to use 128 instead of 28 speed steps. I just to need to work out all this stuff about speed curves now, and how that might affect the first speed step - the Hornby Class 60 I have fitted the decoder to seems to move a little too fast for my liking on that first step - I want it to be an imperceptible crawl, not straight to 2 mph (which is what it looks like to me) ;-)
I suppose now I will have the joys of finding the somewhat 'huge' sums of cash to get the remainder of my loco fleet equipped (around 80 odd locos at last count, though many of these won't need Gold decoders of course, but they are sooo smooth running :-)...