Think you can use Kodi on most if not all Enigma2 boxes, so you should be all good.
I've been toying with getting the Duo2 for a while now, but I keep putting off as its not gonna do a huge amount more for me than the Zgemma H1 I have... Possibly 2xDVB-C tuners would be a benefit.
But I can't justify it to myself ATM....
That said I hear nothing but great things about Vu+ boxes, if you decide to splash out im sure you wont be disappointed
Be sure to post how you get on if you do take the plunge