I bought the iTech R35 off ebay, cost me about $45. Never had it skip, sound quality is fantastic, I can get about 15-20 feet away from my gym bag. Such a small little device clipped on my pocket and I use my own lightweight headphones. I can even change the song forward and back. My logitech BT headphones cant do that.

Sometimes when I'm at the gym I see someone with some bluetooth heahphones. Boy do they look big and heavy.