The WOW factor in Acoustic Zen interconnects...

The difference between the two is that the Matrix resolves more detail and has more extension up top. Bass balance slides slightly infavor of the Matrix as well(although it's negligable, considering proples problems with speaker set-up anyway, and thus bass is all over the place!).
The WOW is without a doubt about the best cable you'll find at that price range, and is better than $500 Audio Quest Python, and comparable to $500-900 Cardas in my oppinion(at about the same detail/rez). Actually(go figure) the WOW is competetive with the Harmonic Truth link for same money(maybe slight edge to WOW).
If you can spring for the extra bongos, at least on the amp to preamp connection, DEFINITELY get a pair of Matrix to go between amp and pre!...then use the WOW's between source componets if you are budgetting. If you can't swing the Matrix, the Wow still sounds great, only not the last word in resolution.
Love that Acoustic Zen product!

I have both interconnects in my system and have to pretty much agree with Sherod and Lthkeeper. First of all, all of the Acoustic Zen products are first rate. I have their power cords, speaker cables and interconnects. Every one of their products is superior to anything in their price range. (even way beyond the price range) The new design Matrix Refs are copper and silver. They deliver deeper, tighter, more detailed bass than the original version. Resolution of detail is excellent. You'll be surprised how much more information you will hear with these plugged in. Gotta agree with Lthkeepr on the Matrix Ref connection between pre-amp and amp. Also if you have a CD player in this system, a Matrix Ref needs to be there too. Otherwise, the WOW would be an outstanding choice for the balance of the setup. AZ has just come out with a new version of the Tsunami power cord. I have never heard the original but have the new version currently plugged into my pre-amp. This cord is amazing. Better resolution and soundstage than products like the King Cobra and Whale. (I own them both)Not quite the lower end dynamics of the others though. BTW, there is a "harmonic rightness" with Acoustic Zen products. It seems the more you put into the system, the more you hear it. Congrats on your choice of AZ's. Hope you'll like them as much as I do.

I am using the WOW's and having good results. I replaced Audioquest Vipers. The boosted midrange is an enhancement on the speakers I am currently using(Martin Logan Aerius I's).

Thanks to everyone for the insights. I appreciate you taking the time to give me your input and experiences.