As an ex Dyn owner I can honestly say as you move up the line there is a level of performance increase. Not earthshattering but it is there. Maybe the point of diminishing returns but every little bit adds up. Is it worth it to you? That's a decision you have to make. If you like the Dyn house sound (not hard to like IMO) they ALL are a bargain. I said I'm an ex Dyn owner. I had the C1's and C1 Signatures. To beat that that sound I had to go to a speaker that retails for 44K plus. 5 X the cost. To me they are a lot better in many ways (except cost vs performance). But there are some manufacturers that may cost a bit bit less that may suit your preferences. It's a personal thing.
BTW all but the the Focus XD series is or will shortly be discontinued. Something to think about if price is or isn't no object (if you know what I mean).
BTW all but the the Focus XD series is or will shortly be discontinued. Something to think about if price is or isn't no object (if you know what I mean).