FR1505/6-4 - A light-duty two-hand rod for big trout and small steelhead like those aggressive little "half-pounders" on Oregon's Rogue River and Northern California's Klamath River. Designed to fish light lines on smaller rivers where the water is clear and the fish get spooky. It gives you excellent short-range line control for mending and it handles long leaders and small to medium flies well. It is a great option for fishing small coastal streams and the brush-lined rivers of the Great Lakes region.
FR1566/7-4 - This 13-footer is an excellent choice for fishing small salmon and summer-run steelhead, especially where you need a little more distance. Where this rod really shines is on the big western rivers like Oregon's Deschutes. It's a great rod because it's so "versatile" and can cover any fishing conditions you may encounter during the day. It fishes medium-sized flies and has an extremely light feel and swing weight.
FR1567/8-4 - Here's a great all around salmon and steelhead two-hand rod. Perfect for large steelhead, silver salmon and atlantic salmon. It gives you incredible distance and positive mending control. It will handle medium to large flies, even in high wind such as anglers encounter on Argentina's Rio Grande. It's a killer stick on the western rivers of Alaska as well as British Columbia.
FR1628/9-4 - When the rivers as well as the fish start getting bigger and you need more distance and better line control, this would be a good choice. It has a medium-fast taper and the power to pick a lot of line off the water, with long belly lines. It handles 550 grain Skagit tapers with heavy sink-tips and big weighted flies. It's for fishing in nasty, windy, "I wanna go home" conditions, but you won't with this rod in your hand.
FR1629/10-4 - This is the "F-350" of spey rods. You can keep loading it with bigger lines and bigger flies and it'll keep on going. It's designed to cast the largest flies for salmon and big steelhead effortlessly. It will help you reach those happy fish on the far bank. When the conditions get tough, whether it's high water or wind, this rod will make your job a lot easier. It would be a great choice for casting to stripers with big flies in the surf.