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Originally Posted by
guitz 
I'm considering the 1910 or 790, and after reading thru about 15 pages of this thread, I haven't really read anyone raving about how happy they are with the loudness they get, or more generally, that feeling of HUGENESS you get, like a good PA in a club..
the "HUGE SOUND" feeling you are describing is not created by the receiver, it's mostly going to be produced by a combination of your speakers and room acoustics. A PA in a good club or concert venue is using gigantic, extremely efficient horn-loaded speakers powered by professional amps pumping out several hundred watts of power.
You can't take a pair of moderately efficient speakers that don't handle a ton of power, and think that swapping from, say, an Onkyo to a Denon is going to turn them into a HUGE sounding setup like a professional PA. 50W vs 70W or whatever isn't going to make a difference; as JD notes above even if you DOUBLE the power you are only gaining 3dB of headroom.
Now, that being said, you don't actually NEED that much power in a typical living room as you aren't talking about nearly as much volume. The good news is you own Klipsch speakers, which are incredibly efficient (your KM-6's have a sensitivity of 98dB with 1 watt @ 1 meter) and can probably be pumping out 100dB+ with about 10 watts of power at a typical listening distance (e.g. 3m away).
So, short story, power is not the issue with your setup. A standard stereo receiver (like your current Sherwood) has more than enough power to drive them to ear-splitting volumes, just like any standard mid-range AVR like the Denon 1910. So, if you are currently experiencing the "HUGE" sound you want with your stereo receiver, you will still get it with the Denon (which can probably put out a clean 100W/ch+ in stereo mode).
The reason you have a recessed mid-range is your speakers have two 10" woofers and then a single 1" tweeter, there is no driver that is going to be smooth and competent with the midrange there. Also, Klipsch's tend to have a very "bright" sound as it is, and if your room is "live" (e.g. bright acoustics, lots of reflections) it will make the treble sound even more overbearing relative to the midrange. In this sense, Audyssey WILL help because the entire purpose is to equalize your room/speaker acoustics for a flatter response.
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which leads to my next question.... does this audyssey feature allow for parametric EQ, or is it graphic only? Is this digital manipulation or analog?
first off, all processing (EQ, bass management, etc) in a modern receiver is going to be digital, period. Not just Denon.
Second... Audyssey does NOT allow any tweaking of the EQ bands. You have two choices for EQ using Audyssey -- the "Audyssey" reference curve (flat with a tapered roll-off on the high end) or the "Flat" curve (flat all the way up). There is a separate manual EQ option which is a simple, 9-band graphic EQ (non parametric). Audyssey's EQ filters are a completely different thing and are not related at all to parametric EQ or any other traditional EQ system.
If you are a tweaker who wants to diddle around with a parametric EQ and like to have a bunch of different EQ "curves" memorized for various types of content, you may want to look at the Pioneer AVR's. The MCACC system on Pioneer is based on parametric EQ (unlike Audyssey) and you can tweak the EQ yourself and save multiple different EQ presets that you design yourself. Audyssey, on the other hand, is a "black box" system where you set-it-and-forget-it.