Hello from the Battenkill in Vermont..I have been using a Scientific Anglers "Mastery Express", 250 grain for the last (4) years...Great line for deep/fast water in the spring..I also have a 150 gr which I will try this spring...I have found that using a pair of Zonkers, pearl & olive works well here on the "kill" and also in Montana...Try it and let me know how you make out...I would not hesitate to buy a "streamer" line but I think any heavy sink tip or full sinking line is better...
Marty Oakland