upgrade Dynaudio Special 40 to Kef Reference 1


I am planning on an upgrade. I am currently using Dynaudio Special 40 speakers with a Hegel Rost amp and JL audio subwoofer. Will i notice big difference if I upgrade to the Kef Reference 1 speakers? Another option I am considering is to upgrade the Hegel Rost amp to a Yamaha AS3000 amp. Which upgrade is more beneficial at this time since I can only do one upgrade. Thanks.
I might want to add the Focal Kanta No.1 (lower price) or Sopra No.1 (higher) to your check list before laying down your cash.  The Sopra is a stunningly well integrated, surprisingly wide range, relatively compact stand mount. I haven’t heard the K1, but if the No.2 is any indication, it too deserves a listen. 
For the sake of transparency I should mention we are Focal dealers. But I speak for myself. 
Thanks all for the contributions. I am now thinking to keep the dynaudio speakers and change the amp. I like the mcintosh type of sound but don't have the budget now. any recommendations on amps?
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The KEF are about as different sounding as can be from the Dynaudio. I really like the Special 40. Technically the KEF is probably superior but I could listen to the Dyns all day.