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I believe most folks would find the Color Efex over-cooked. There's much you can do with it in Photoshop and, I assume Lightroom without over-cooking it. Try a curves layer and some dodging to brighten the lightest parts of the clouds. Using the unsharp nask at 16, 60, 0 can add some mid-tone contrast, for example. You could add a duplicate layer with multiply blending mode and tweak the oacity.
The B & W version is good as is However, you could tweak it with dodging the clouds and perhaps some burning. (If you've Silver Efex Pro, you might consider the 014 Grad ND preset and some dodging and burning.)
Much opportunities for play are making many different alternate versions. For example, using some of the possibilities I've mentioned:
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