Seeking more 3d imaging, deeper/wider soundstage


I'm considering replacing either my amp or my pre. My system is profiled in my system link. Which do you think would improve soundstage/imaging more:
Replace the P3? I'd consider used McCormack, or a passive line stage, but my amp clips at 5v, which is what my DAC puts out when using the XLR outputs, and I'd like to try those someday...not sure a passive is a good fit for my system? Plus I require a remote. That's a deal breaker.
Replace the Rotel RB-1080? I'd consider parasound (a21 is a bit too pricey for me), used McCormack, odyssey, maybe even older krell or classe. I want XLR inputs tho.
Budget is $900-$1200 for either. Music spans the full gamut, excluding hip hop and country. Room is small, 12x12x8. I'm going to throw up some affordable foam acoustic absorption this summer (foam factory). Thnx in advance.
realremo
All the above is great advice. Start with maximizing speaker placement. Looking at your system pics, I am not surprised by the lack of soundstage depth. The sub may need more placement tweaking too. After maximizing placement, only then would I start down the path of room treatments - which you very well could still need.

Here is a good place to start: http://www.cardas.com/room_setup_main.php

Be patient and do everything in a step wise process ALWAYS listening to your preferred reference track between each move. Good luck - I know you will find the soundstage depth and width you want!
What great responses...kudos to everyone for not immediately jumping on the "buy this new amp!" bandwagon. I completely agree...you have a fantastic grouping of components, you should be very proud. Before I'd spend a penny on any electronics replacements, I'd do exactly what everyone recommends and experiment with getting those Quads out into the room, maybe 2-3 feet from all walls if possible. You really do have nice components, nice speakers (have always liked those Quads), I have high expectations that you are probably no more than some placement tweaking and/or wall treatments away from audio heaven.
try filtering your ac, borrow form a dealer to see if that also helps. Nothing fancy, try something cheap.
Great answers, obviously the consensus is to first move the speakers forward. I'll just add to adjust toe-in in small increments; it will affect your soundstaging.

Even when manufacturers or dealers say "no toe-in on these speakers," every room and system is different.
Thanks Bigkidz. Could you be specific? I don't know much about these plug in power things. Is that filtering needed or conditioning or creating new power? Or all the aforementioned? I think I am at the point I could do something about my power to the components. Thanks for the help.