Adding more $.02, I would go for it. Since you already have the LU 6wt, the 'old' LE (even in 6wt) should be lighter and faster and so would be a step 'up' from your 6wt, but not much of a set up. In 5wt it will definitely feel different than your 6wt. The new LE might be even more different from your UL 6wt so that you wouldn't feel as comfortable with it. I'd go with the 'old' one to keep the 'family resemblance' of feel.