Hey Ty. Glad to hear your getting along well with the Ascends. Upgraditis has got you by the boo boo. Nothing wrong with that, its fun. A couple thoughts as I read through the post.
First, the receiver is your logical first step, but you know this. FWIW, I really like Denon/Marantz.
Second, I run my Ascend towers with an Emo amp and they sound superb. Be patient on the amp tho. Emo runs sales every now and again, or is it every month, seems like a lot of em lately. They have refurb amps like the XPA2 2nd gen for about 15% off on occassion. They also just had a labor day sale on new amps, so keep an eye out for those.
Third, although I absolutely love my Sierra towers, my decision to buy them over say the Sierra 2's was purely an asthetic. I love the look of towers its my thing, please dont judge me.
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
Im sure you have probably read somewhere on this forum, that one of the reasons to go with towers over bookshelves is the full range capability. Most towers really are not full range at least until you get into new car money. The Sierra 2's can be ordered with the custom RAAL tweet, which I can't recommend enough. Paired with that nice HSU sub you have, should sound pretty sweet. In addition, the money saved could go toward the Sierra center or a matching HSU. I am by no means trying to talk you out of the towers, just giving you food for thought.