@Kousa - Love the Arabella combo but they're all so nice.
@mieko2 - It's best to move a clematis in late winter or early spring, just before new growth begins.
Normally I'm a big fan of color echoes, but as I age I tend to go with contrast more often.
I agree that Walker's Low is best in full bloom, then it goes downhill and loses that magical effect it once had. Every plant has its own time to be the star on stage. It's up to us to accept it.