A couple of questions before I give suggestions on a pre/pro:
What processing power do you NEED?
Will you be using the pre/pro for video as well(upconversion to component or whatever).
If are not going to use it for video upconversion, I would look into a used Outlaw 950 pre/pro and a used outlaw 7100 amp. This will put it a little over the thousand dollar range, but it would be worth it. The amp would be much better for your speakers than the Denon. Plus, if you ever need to upgrade, you can still use the amplifier and just upgrade pre/pro's.
If you are going to use it for upconversion, I would suggest looking into a new/used Outlaw 990 pre/pre. They are more expensive, a little over a thousand, but this would also be worth the money.
Have you already bought your speakers?
If not, just get the front set for now and spend more on the separates.
Buy the svs and surrounds later when you have saved up more $$$.
Also, if you do want the RTi8's and CSi5 my brother bought, it could save you some money.
Hope this helps.
Zach
BTW, go here to view the amp and pre/pro:
www.outlawaudio.com
Also, I just looked at Audiogon and you can get a outlaw 755 amp for about the same price as the 7100. The 755 is only 5 channels, but it has more watts per channel, and you can never have too many good, clean, high powered watts :D .