I just use what I have on my reel, 10lb Krystonite. I would recommend Maxima Chameleon whilst not a floating line (you can get it to float) it did the job for me for years, I do keep toying with the idea of spooling back up with it.
There was a thread I posted in some time ago, whilst I was still using it, rating it as floater line, Frank backed me up with some test results from various lines stating Chameleon was one of the most invisible. I can't for the life of me find the thread though.
I do have some floating fly line that I have made a rig with in the past, it worked great but I only had it in 5lb so couldn't take it to many places.