Amps or Speakers which one to upgrade next

+1 Randy
A pair of used Quatro's would definitely be in the price range and you'd get a sub, too. Otherwise, I would get a pair of 2wq subs for your 2 sigs.
to fill out the bottom end.
Bob

@tomstruck,
I heard the Aesthetic at Johnny's (Atlas?, I believe), with a pair of ProAc's (don't know the model), and was very impressed.
I think you should post your question to him.
I would trust his opinion implicitly.
B

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