I did like the ones Derbi did a few years ago, the Mulhacen 659, using a Yamaha designed 660 single. They tried to make it look less classic scrambler and more modern dirt track, I once tried one out but ended up not buying, Maria was the prospective owner and she found the whole thing a little intimidating. It was a fun bike to ride around town, though.
If it was for me alone I would probably ended up buying a XTZ660 Tenere with that same engine, even though it probably felt slower.