Re: Fly Line for Sage TCR
For fishability, I'd probably go with the new Sharkskin GPX line. Its a bit extra heavy, and that line REALLY does zing through the guides. If super long distance casting is what you're after, I'd go with Airflo's Ridge Distance line. Both of those suggestions are if you're going to get a 5wt line.
If you're going to upline, I'd go with SA's XXD line. Its not heavy for the line weight, and the long belly will work well with that rod. A newer and slightly different line would be Cortland's new Western Drifter line. SAme basic configuration, but its got a 3' high floating white tip to serve as an indicator.