SA's GPX is my line of choice. My fishing sounds alot like yours,RC3. GPX is reputed to be a half line size heavier than on the package making it easier to toss the heavier flies. I have good luck fishing bass bugs and heavier flies and when I occassionally go trout fishing it's delicate enough to get the job done with dry flies. Generally speaking though, I think Lee's got it right. That is, you should be able to do what you want to do with any general purpose line from any reputable company so long as your technique is adequate and that's the route I would go rather than a special purpose line unless, of course you want to invest the money in several different flylines. Most good fly shops have lines you can try before you buy.