hi, i am interested in trying to fish for steelhead with a fly rod, and was wondering what line weight to use to get started? i usually use a 6 weight for my trout fishing. but was thinking of using an 8 or 10 weight for steelhead. to be honest i don't understand the purpose of the different weight lines, an assume that it involves more line weight for casting bigger flies and into wind. also what would be the most useful line for someone on a budget to start with, sinking, floating or sink tip? i was considering cortland 444sl salmon/steelhead quick descent. the rivers i have in mind to try are stilly, both forks and main, sauk. thanks for any advice.