Amps or Speakers which one to upgrade next

unless you increase your budget for much better speakers do what simao said.........more music !

Hi Tomstruck,

I would agree with those who are advising you to invest in cabling.Your $7k investmentment will go alot further by purchasing  a top rated power cable. It will provide you with the some of the bass and clarity that you are looking for.

Also consider switching out your speaker and interconnect cables. Another consideration is to roll out your driver tubes (12AU&X7) for some NOS. Rogue is really friendly to Tweaks and responds well to power.

Making these changes will maximize the performance of your existing system. Check these sites out for ideas. An investment into any one of these kinds of cables would shurley be your last. 

Finally, after these upgrades if you still require more bass,  you could  add a subwoofer, as the cronus allows for it. I would not go beyond a 12 inch driver. I think REL. Older B1 would work really well with the Vandersteens.  

In my humble opinion - Best bang for buck scenario, Good Luck

Thales - use for speaker cables and  interconnects 
www.tonarm.ch

Stage 3 Concepts - Best for power chords
www.stage3concepts.com

HB cable design, Best for power Distributer if needed.
www.hb-cable-design.com

BRENT JESSEE RECORDING & SUPPLY, INC - great NOS tubes
http://www.audiotubes.com/

I agree with Nycjlee and restate my comment to go back to John Rutan and get his take on this.
You've gotten lots of good responses, but I think that having Johnny will provide you with the best information for your situation.
I need to go and listen to his systems again.
Bob 

Thanks 2channel8 ordered iostek set-up disc 
Like I said in a previous post I talk to John all the time
I will be at Johns on 12/16 for the Vandersteen open house

@inna 

The very basic principle of electronics is that a good design should be independent of individual device parameters. To put it in the language that everyone here will understand -- if tube rolling changes the sound of your gear, then your gear is garbage.