I own a Koss SportaPro for a while now, based on my tests, it's the best sounding portable phones compared to Bose and Sennheisers, i'm planning to buy new headphones. How does the Beats Solo hd compare to the Koss??

I've read tons of reviews of the Beats but none compare the two. So is the Beats worth it? Or should I stay with the cheap and cheerful one? Thanks!!