$7000 preamp vs $700 receiver - Is the difference THAT significant?


Current setup:
Marantz SR5005 (AV Receiver) + Peachtree Amp 500 + BluSound Node 2i + GoldenEar Trition 2+ = Current Setup

I'd like... no, want... no, desire... to add "Blue Meters" to my setup.  McIntosh haunts me.  For dozens of years.

My quandary:
Acquire a McIntosh C52/53, maybe C2600/2700... vs something like a Marantz AV7705 (or AV7706 appears it was just released).  Yes I know I'm comparing brie cheese and cheddar.  I'm more concerned with the notion that I can get "as good" sound out of that Marantz preamp, as I can from those McIntosh units... (ignore the multi-channel notions for the moment)

Is my sonic happiness "that much better served" by a McIntosh $7K unit vs a Marantz $2-3K unit?  How much difference can I expect?  
rabbottmke
Don't sell that Peachtree Amp 500 short. It is fantastic with the newest Ice Edge AS1200 cards. Going to a better preamp will let that amp sing!
@jjss49 and @rodman99999 so this is what my DEALER is essentially trying to tell me. "Don’t waste your money on a Mac, get a $2000 AVP like the Marantz AV7705". He knows I’m lusting over the blue glow, and is trying (I think) to keep me from wasting money.

So there are three camps here.
1) Those that say the difference is significant, but your ears probably suck so don’t bother.
2) Those that say the difference is not much, but you’ll love the blue anyway.
3) Those that say "split the difference" and do what your dealer is trying to get you to do, by staying away from blue, and only kicking out the AVR for a modest price difference in a new dedicated AVP.

Thanks for the feedback folks. Lots to chew on!
I’d look at the big picture. If you can set your speakers up properly that’s a big plus.  If you have one in a corner and another in a hallway, you might see tonal differences but don’t expect miracles.  If you have great setup and amp you can hear changes in cables.  Do it methodically.  Foundation up.  I’d go with the McIntosh it’s a solid piece- just keep in mind that lots of people collect McIntosh for all kinds of reasons (not only sonics) so that can skew the price to performance ratio. 
@rabbottmke

So there are three camps here.
1) Those that say the difference is significant, but your ears probably suck so don’t bother.

pls don’t misread or misinterpret what we are saying on the above - we don’t know you, your system, your room, your hearing

the SQ upgrade will be there if you upgrade to a high quality 2 channel preamp from the AVR as you are considering... we simply don’t know whether ’your ears suck’ as you say - so we can’t promise you will hear it -- but we are confident to say, given a decent room and setup, with your gear, the improvement will be there to be heard...

good luck