I'm looking for 11s. What is the brightest set out there? I'm talking shimmery, sparkling bright. I have a set of Adamas on my Ovation -- very, very bright but it only lasts for a few hours. And I have a set of Pyramid Gold flatwounds on my Epiphone John Lennon acoustic -- very, very dull on the bass side. Recommendations for the brightest acoustic strings, please.