I bought a LOT of the discontinued SA GPX lines in 4, 5 and 6 weight off Sierra Trading since they had such a good deal on them for so long. They might still have some. Not sure if it would be the best specialty indicator line but for just general floating use they're a good deal.
Update: I just checked Sierra and I no longer see the GPX lines, they must've finally sold all their stock. But they do seem to have a ton of different Airflo lines, at about half or less than their original MSRP. I was tempted to grab a few more lines that I don't need.
SA GPX or whatever they are calling that taper these days. Not the SA Trout Taper, which I find great for roll casting and dries but not great for indicators.
for indy lines usually whatever WF is on sale at Sierra Trading Post in the appropriate weight, and then if I think the forward taper needs it will chop off a few feet and install a braided loop...tends to make chucking indies from the boat a bit easier