I usually buy whatever I can get a good deal on. I try to find Scientific Anglers or Rio lines when I need a new line.
I would however, recommend staying away from the overweight lines, nymphing lines, streamer lines, etc. unless you have identified an actual need for them. In 8wt lines, they are just overkill for typical Erie steelhead fishing. If you are just doing the typical indicator rig and bugger fishing, a standard 8wt line is more than enough already.
Personally, I've moved to fishing 6wt rigs in PA. I find it easier to get better presentations and the lighter gear is just better suited to the size of streams being fishing. Fish can still be brought in pretty quickly with appropriate sized leader and tippet.
Kev