To upgrade cd player?? The slippery slope?

Hi, I got sucked in to this audio game quite by mistake while looking through the public library for info on setting up a car stereo. Sidetracked by "Good Sound" by Dearborn?.
Bought some components over E-bay, and had a pre-amp given to me, and my music listening is changed dramatically. I think the real culpret is the Magnum-dynalab ft-11 tuner. Whereas I used to listen mostly to tapes and a few cd's, now its all about the radio. My limited taste in music has been stretched. I'm listening to a jazz, blues, classical, rock-- virtually anything played on the 3 good non-comercial stations in my area. Even the musical interludes on "All Things Considered" on NPR is fun for the ears, wheras it used to just make me mad and impatient. I've had the system about a year, and I've started to collect a few more cds.

But to get to the point.

This is a budjet system to be sure, and some will want me to upgrade in more directions, but I'd like my cd's to sound at least as good as the radio, and that is not the case. At least, not as engaging and fun. To spend $800 on a Jolida jd100 (for instance) would be more than twice what I have invested in my costliest component.

So here is the list:

pre= dyna pas 3
amp= carver tfm-6cb (65w@8ohms, 100w@4ohms)
speakers= spica tc-50
tuner= magnum-dynalab ft-11
**cdp= onkyo integra dx-7500 (1989, 18-bit, 8xsample)
**tape= nakamichi cr2a
interconnects= kimber pbj w/radio-shack gold plate term.
sp cables= kimber 4tcx5'

** components left over from previous system

So ??? buy the Jolida? Or a used dac? Or live with what I have? Or other sugestions?

Thanks, Aloha

Miser lee