I love how your experimented here - the unsharp mask really has brought out the detail here! As for the best - from my terminals viewpoint and what Ive seen of the other posters - the higher radius you used works best for these 'scenery' shots - lower radius for closeups seems to work best! Not sure about clipping - in CS its threshold I think - it does seem to boost the contrast too! Awesome challenge entry - Im learning so much checking out these results!
