With the ever changing technology this past year and the next 2-3 years, to me it boils down to features vs quality. I just bought a
Cinenova Grande amplifier, and rather than spending another $5k on an anthem D2 or double that for a lexicon MC-12HD, I started shopping for an interim solution for the next 2 years or so......during this time, I've learned a LOT regarding the "sound" and feature set of Pre/Pros vs Receivers.
As example, just a few days ago I came back from auditioning the Pioneer Elite 84TXSi, Yamaha 2600 (testing the sound as baseline for the upcoming 2700), and denon 4306/3806, as well as a good Pre/pro in the Krell SCP71:
http://www.avsforum.com/avs-vb/showthread.php?p=8417429&&#post8417429
Why doesnt Denon or Yamaha make any Pre/Pros? dont know the business reason, but I can tell you that for the mass market that they are aiming for, the solutions such as the RX-V2600/2700/4600/etc and the AVR-3806/4306/4806 are what they will be doing for years to come.......which leave those of us wanting a pure Pre/Pro solution with this option:
buy one of these as a Pre/Pro at this price range, or save up and buy the higher end boutique Pre/Pros if you can muster it.
Take the $1000-$1500 market: If you look at Receivers with excellent pre-amp sections, and feature sets that will keep you over until the next gen formats are settled, you are left with just a select few: Yamaha 2600/2700, Denon 3806/4306, Pioneer Elite 84TXSi. They are the ones that offer all the HDMI swithching, upscaling/upconverting, 1080p capable, ethernet/usb/iPod connectivity, AutoEQ and Calibration (Auddessey, YPAO, MCACC, etc), and they offer excellent Pre-amp sections....so good in fact, that Dolby labs and many other researchers are starting to use them for sound processing instead of dedicated Pre/Pros:
http://www.audioholics.com/cedia/cedia2004/DolbyTrueHD.php
http://www.audioholics.com/cedia/cedia2004/DolbyDigitalPlus.php
(looks like the familiar Yammy RX-V2600 to me
In this same market segment ($1000-1500), you can buy a number of descent Pre/pros as well....Outlaw 970/990, used Arcam AVP300/700, Emotiva DMC-1, and others. Good sound, but after having listened to several of them, not better (if at all) than the recievers mentioned above, AND MOST IMPORTANTLY, they lack the features....no ethernet, no AutoEQ + calibration, some have no Video HDMI switching and/or upscaling, etc.
Now, I will be the first to tell you that I have an open mind about all this, and more than once I've been suckered into buying something because of all the forum hoopla and hearsay (Sony SXRD anyone?), but I've come to learn to try things on my own. Yes, these pre/pros are good, but receivers in this range have equal and many times better pre-amp sound, AND have a much larger feature set...... You really have to listen to an Anthem D2 or Krell SCP71 pre/pro to really tell a big leap in sound quality.
so my question to the OP is actually this: why wait for Denon/Yamaha/etc to release a Pre/pro? they are already here! get the upcoming Yamaha 2700 or the current Denon 3806/4306, or Pio Elite 84TSXi, and you have the Pre/Pro that you want....and in 2-3 years when DD-HD, DTS-HD, 1440p, and other formats are "standard", then keep the beefy hefty amp that you bought, and just keep upgrading to your hearts content on these covert "Pre/Pro"s that we call Receivers