best pre-amp new or used for under $500?


Hello there, just bought a 2-channel power amp and need pre-amp advice. My budget is low, as the title above states, and the power amp is a Rotel RB-1080. Speakers will be either Ascend Acoustics Sierra 1, Dynaudio Excite X16 or Totem Rainmakers. I have not auditioned these speakers yet, they are on my list because of reputation, look and price. Source is a Yamaha CD changer, will upgrade that after the speakers arrive. Room will be small, 12x12x8. Would prefer to have a couple sets of pre-outs so I can hook up a sub if necessary. A remote is an absolute must, my listening sessions are 90-120 minutes long. Thanks in advance and happy listening.
realremo
Well, that's how it goes, first I buy, then I check it out....Yah, I just put in an offer for a Nakmichi CA5 MK11, and first thing I read here is that it doesn't sound good. Many years ago, I owned a CA5, and regretted ever selling it. But maybe a mod of some sort will bring the MK11 up to standard.
UPDATE - I now play 2-channel music through the Denon, using the Audessey room correction and the "restorer" set to "HD." The latter is meant to give detail and weight to the high and low frequencies. Using all of these processors isn't really a purist, audiophile way to listen to music, but it beats the hell out of the Denon's "pure direct" mode, and I'm pretty happy for now. I had to play around with speaker placement, listening position, and all of the settings on the Denon, but I have arrived at a fairly good place for 2-channel music. Wouldn't it be something to buy a dedicated pre-amp and new speakers for my basement office, and not get better 2-channel sound quality than my HT rig...? Well that experiment will have to wait until the economy comes back...
Ok, so I got a Nakamichi CA5 instead of a CA5II. Got a question; any ideas about some simple upgrades in the circuitry?
I would recommend you to stretch your budget to under $800, then you will have alot more choices. I went through similar path, from Adcom ($250) to Rotel ($350) to Audible Illusions ($700), and the AI is a different league. For instance, there is one factory refurbished on sale now for $675 with 6 month manufacturing warranty. To me, it is a good deal. Just $175 over your budget, and it is a greatly praised preamp. And there is a Cary slp-88 for $750.