Now that's out of the way IMO the newer models have more forward and brighter highs. With Dynaudio it has a 'house' sound. The level of refinement gets better as you go go up the ladder. But that said they have speakers that are pretty 'laid back' and some that are more forward with 'almost' sizzling highs and very forward mids (Sapphires - S25's and Consequence UE come to mind - which are also older models).
I can't recommend enough listening to as many in your price range first to see what 'series' you prefer. I used to have original C1's and later the signatures.