Mikey,
The Quad 99 CDP or 99 CDP-2 is a very good sounding CD player when used direct to amp. It also has multiple digital inputs, so you can use it as the pre-amp (switcher) for multiple digital sources.
I had both a 99 CDP and a 99 CDP-2 a few years ago. I connected my DVD player and digital cable box through it with good results. If I still had it today, I would also be connecting my MAC Mini based music server through it.
I've seen them for as little as $600 and it is a very good unit. BTW, there is also a Quad 99 CD player (not CDP). Don't buy it. I think it is only for use connected directly via Quad-link to a Quad integrated amp.
Does the Cambridge Audio 840c have variable volume? If so, it might be a good choice. It gets nearly universal good reviews.
Another very good moderately priced player with variable volume is the Cary DC-308 that I once owned. Supposedly the CD-308T(tube) is even better, but I've never heard one.
Enjoy,
TIC