The ION is heavy because it uses lower modulus graphite. It goes for durability/workhorse quality over the finesse/sensitivity of a high modulus rod like the Stillwater. For the light rods, you're sacrificing durability, which matters on things like guide boats or people who are rough on their gear. I'd say for a large number of people, especially guides/lodges, a tank like the ION is the way to go. Pluses and minuses to both.Wow, I just looked, the ion is 5.8oz. My 10' 6wt stillwater is 3.2. I use the fighting butt, and it balances with a lamson remix 5 . I had only compared it to the Lago at 4.1 oz. when shopping. Not to heavy to tight line or bobber fish moving water either.