Intimidator has it down pretty good - my first rod was an Orvis 5, full flex rod and was fine for trout... not so good for anything bigger than 4-5 lbs. Then I purchased a Reddington 5-6 wt that had a little backbone to it - that one landed my first steelhead, what a battle. Since you stated you wanted a trout rod, stick with a 4-5 wt. Not to sure who ended up with Redington, as it has changed ownership a few times, but they were some pretty darn good rods for the price... one of my favorites still, and I have a selection.
good luck and let us know what ya go with!
mark