Nothing wrong with a bit of a bias
The issues with the system don't sound too good, but as what I'd be doing will be fairly straightforward, I'd hope not to encounter them.
I have looked at the Helvar products, but from what I can see on the website the style of the rotary controls isn't quite what I'm after, although as the controllers are DALI compatible I may be able to get one in the right style from someone else. The attached pic shows what I'm after.
I've also got Hamilton-Litestat's Digital Mercury, iLight's iCAN and LEAX's SceneMaster 4x4 on my list of possibles.