What should be removed

" Do you have any more suggestions on the amplifier?"

Did you have something else in mind? The Ayre has a very good price/performance ratio. You can definitely use something else, but you just need to be careful with regards to your other components gain. The Cubs are something like 95db, and like any high efficient speaker, they're not forgiving when it comes to gain. If you're not careful, you can get a hiss.

If the Ayre is too much, maybe look at the Parasound Halo integrated. It goes for around $2500 and it has a dac. The Halo gear has a good track record when being paired with Wilson. Also, having the dac, preamp and amp in one box should eliminate any chance of gain issues. You probably won't like it as much as an Ayre, but it should still be a huge upgrade from what you have now.

titus1 your question and setup are both confusing. First thing, why do you want to change? Second question, the Accuphase E-206 is an integrated for what purpose are you using the  Hitachi and AR preamps? I would imagine the E-206 is a nice integrated Accuphase makes nice stuff, so if you are really looking to upgrade it may take a fair bit to improve on it.

The impedance drops down to around 3 ohms over the 200Hz–1kHz region. A good deal of the power in typical program material falls in this range, which suggests that the CUB will not be particularly easy to drive.
http://www.stereophile.com/images/archivesart/wilCubfig1.jpg

To get the very best from these Cub's.
This is from Stereophile’s review/measurement results, pick the right amp that can do it easy into a 3ohm load and with current ability.

Cheers George

I have a pair of Cubs myself and have no issues driving them. Actually, they're very easy. For the last several years I've been using them with my VAC 30/30 tube amp. (30 watts/ch). Its a great sounding combo, and the amp doesn't strain at all. 

I have some high quality SS amps just laying around that I could put in the system at any time. After comparing them side by side, I still prefer the VAC. If we were talking about some of the bigger Wilson's, then I would agree on needing more power.

Both Accuphase & VAC should not have difficulty driving the Cubs.