Mike the Seattle show is the biggest show on the west coast. That said, it covers all types of boats. There will be a lot of alum there but you'll see a lot more fiberglass. The 2 sportsmans shows (Puyallup & Monroe) will have a lot of alum builders there. Nothing wrong with going to all 3 shows. Talk to all of the builders, not just the retail salesmen. Boats rarely appreciate in value so get it built exactly as you want it. The alum guys are great at customization. What you see at the show are standard dealer spec configurations. Look at a lot of boats, ask a lot of questions, get advice from the experienced sledders on this board. You could start another topic thread asking "If you were to buy another sled what would you want on it?" The guys on the board aren't shy and would give you some good advice.
_________________________
It's wonderful to be good. But it's better if you're lucky and good!