Lovely shades. I think it's overpowered by all the black at the bottom. Cropping most of it off will allow more concentration of the rolling hills, sky, and tonal range.
Excellent capture! I agree with snapshooter87, I think the black at the bottom is overpowering, perhaps lightening that area up to show some of the detail, or cropping it would help enhance the marvelous sunset. Bravo!