WOW!!! Even better than your 'Merlin' figure! I have converted two versions of this model (have added a helmeted head) for my WAB Romano-British/British Kingdoms army - it's a lovely model and your painting is brilliant, especially the shield and cloak. Please keep posting as you do more models and if you want to see some of my Arthurians, let me know and I'll post some pics. You'll find some on my blog in the archive if you care to look there, but am happy to display a few here.
I am also trying to draft a set of Arthurian skirmish rules (same sort of scale as GW's Lord of the Rings, so about 30-60 models per side) at the moment, which is proving interesting, as it's the first time I've tried something like that...