Well, you definitely wouldn't want a warmwater (also called "tropical") lines for fishing up here. The warmwater lines are extra stiff so that when you use it in warm conditions, it softens up to just the right limpness. In cold weather, you will just have coils upon coils to fight with.
I use Cortland's 444SL as well as the Clear Camo lines, and I've been pretty happy with them. They haven't cracked or clouded up on me. The clear camo does have a green tinge to it...so it's not perfectly clear. The clear camo sinks slower than the true clear line. The clear line sinks closer to a type II rate than an intermediate.