Malamang personal choice ni master Ivan would be Cambridge.
I have a somewhat divergent sonic preference, which makes me favor units that are otherwise unpopular (at least locally).
I'd personally choose the Marantz CD6003/6004 or the Cambridge 550C. The CD6003/6004, because I like its spectral balance and the fact that it has a USB port. The 550C because I like the detail and PRaT of this model, plus the fact that I've had very good experiences with Avesco/5th Ave. Both the 550C and the CD6003/6004 are the only players here that I've heard deliver some appreciable depth. The CD5003/5004 is also a great budget option, trading some of the 6003/6004's pace for an expressive and weighty sound (Stereophile and What Hi-Fi love this model).
The CS-5VL supports SACDs and allows the use of different digital filters, giving it an edge in terms of features. I have SACDs, so this might be my choice if I didn't have any other player. The presentation somewhat approximates the Rotel sound, which is a good middle ground (imo).
The NADs deliver a different sound (carrying a more pleasant and flowing character), which I also enjoy --- however, it's not the one that I prefer. Despite this, the C515BEE is such a great bang/buck player that it's hard to ignore. The C545BEE is a livelier listen, with the same wide and shallow stage.
Just like other budget players, the 350C has a warmer and more rounded character (when compared to upper models of the same maker). In my opinion, it's gone too far that it almost sounds like a chestier NAD with LF steroids (losing most of the stereotypical CA sound). I'm sure a lot of people would prefer it this way, based on my observation (and what dealers have told me).
Any of these models can sound great, as long as you get a good match for your system (and your sonic palate).