Here's how I would do it. Get a cheap 7 or 8 wt ($50). Cabelas has them for that price. That way, if you find you hate steelhead fishing you're out less than $100--or less if you turn around and sell it. If you really like steelhead fishing, you'll probably upgrade to a spey/switch rod soon anyway--and again you haven't invested heavily in your single hand set up. Using light rods will not necessarily harm steelhead, but they increase the chance of an extended battle.