Here's what I'd do, for what it's worth. The Cambridge should make a very good transport, so I'd recommend an Electronic Visionary Systems Millennium DAC II($1050, www.tweakaudio.com) that will be very tough to match for any used $1k CDP. You can try it for 30 days and if it doesn't blow you away just return it.
Since music is the priority in this system I'd get an Adcom GFA-750 that has a Home Theater pass-through feature that will allow it to blend seamlessly with your pre/pro. This way you can use your current pre/pro for surround processing, but for more critical 2-channel listening the 750 is the only preamp in the system. Any used pre/pro you pick up will likely not have the latest processing capabilities and will certainly not match the 750's performance in stereo.
So this way you get all new equipment(I'm pretty leary of buying used CDPs especially) with true high-end 2-channel performance, and you can continue to use your current equipment and don't have to worry about selling it. Anyway, that's what I'd do. Hope this was helpful and best of luck.
Tim
Since music is the priority in this system I'd get an Adcom GFA-750 that has a Home Theater pass-through feature that will allow it to blend seamlessly with your pre/pro. This way you can use your current pre/pro for surround processing, but for more critical 2-channel listening the 750 is the only preamp in the system. Any used pre/pro you pick up will likely not have the latest processing capabilities and will certainly not match the 750's performance in stereo.
So this way you get all new equipment(I'm pretty leary of buying used CDPs especially) with true high-end 2-channel performance, and you can continue to use your current equipment and don't have to worry about selling it. Anyway, that's what I'd do. Hope this was helpful and best of luck.
Tim