There are a lot of options out there. I'm sure you'll pick speakers and decide on the rest of the gear around it. So for speakers that are different than what you currently use I would look at: Avantgarde, Estelon, MBL, Tidal, Wilson & Zellaton. Electronics different than what you have: Boulder, CH Precision, D'Agostino, FM Acoustics, Gryphon & MSB.
Your systems are so amazing already that you've got a fun journey ahead. Like Serge mentioned, Wilson & D'Agostino are like PB&J. I would go with Lamborghini Orange though.
