Pretty much what Rusty said.
I have tried the newer Rio Leviathan line in 400 grain sinktip, and it works awesome, with minimal coiling in the cold.
I have tried numerous sinktips by SA, and here's what I've found. I love them all... But some will fail sooner on you.
The sharkskin, textured, and tropicore lines all start out great, and are smooth as silk until you stretch them ( mainly by deep water snags). We have found longevity issues when the more brittle outer coating starts to crack and Debond in the tungsten sections.
After a couple send backs to SA (and great customer support). I have come to rely on just the plain old standard Streamer Express. I also really like their Wet tip express... It has a fat belly floating line that is very supple and easier to grasp than the smaller intermediate sink lines. Plus if your fishing smaller rivers, you don't have the hassle of your midline sinking and snagging as you're untangling a casting knot...which happens all the time Muskie fishing.
I pair a 400 grain with a 10 wt and my main rod is a 12 wt with 450 grain.
I use monster 12" flies and I need the aggressive sinktips to keep them in the sweet spot on 4-8 feet down through the entire retrieve and fig 8.