The sky in the upper left corner is definitely hot, and I'd like to see the rocks in the foreground toned down a bit as well. Those things could either be fixed with the burn tool, or a combination of masking and levels adjustments (the latter would most likely produce better results). Also, the foreground still isn't looking sharp, so if you re-shoot either find a way to get a bit further back from those rocks or stop down to f/22--I'd like to see the exposure lengthened a bit anyway.
To my knowledge, iso 50 is not a native iso on any digital cameras, so if you had the ability to use it you would be sacrificing some dynamic range. My solution would be stopping down or using a ND filter.
And lastly, landscape stuff always looks better on film...namely Provia 100F for positive or Kodak 160 porta NC for negative.