This does look really good - the tilesets are excellent - particularly the cave / dark grass ones.
Now this is just my opinion, but I don't particularly want to use a modded version of KS. At least until the mod is in a final, complete stage. I've messed up several plays through Morrowind and Oblivion that way and with KS, its one of the few games I play that still feels 'clean' (I regularly dispose of inadequate levels). Of course, as Ponto said, if it REQUIRES the mod, so be it - it just means I'll have to succumb or just miss out. But if there's still an option, I'd vote either both mod and un-modded versions or just for vanilla KS.