I got a vu+ for years, my main receiver, but for French, to be practical, simple and stable am relying on the French box \ card (TNTsat) for watching \ recording. Other reception possibilty is the multistream on 5w, with something like the Octagon sf4008 which is reported to be working perfect for that, makes me want to spend money :O)
If happy with the fransat box reception and picture quality, make life simple and just add the hd :O)
About the vu+ duo, it's, among many other things, good for UK Freesat reception \ recording, so think about keeping it if interested (now or in the future) in general sat reception.