I think the issues you mention are caused by your using your DVD player to play CDs. I'd bet the Pioneer has an excessive amount of jittter that is causing the sibliance (hard ssss's and ch's). Your horns (the JBL 4330's) further emphasize the jitter.
You've got quite a few options. You could go for an exteranl DAC. There are quite a few affordable ones on the market geared towards the audiophile. Most all of them do a nice job on one level or another. I'd stear clear of Pro-Sound DACs like the ART/dio unless you plan to have it modded by somebody like Wayne at Bolder. I'm not sure of any guys that do mods over in the UK.
If you watch the pages over at TNT-Audio.com, Geoff Husband is getting ready to review a very affordable, good sounding DAC that can be picked up on eBay.uk for around $100US. You can also send him an email
[email protected] . This DAC should help reduce the jitter problems you are experiencing.
If you don't want to go that route, you can always search out a DAC from some one else in the UK. I'd suggest an Audio Note DAC kit with a few upgrades if you can afford it. Peter Q does a nice job with his non-oversampled DACs. Since they use valves (tubed), you will get some added dynamics you are missing with your stock DVD player.
You other choice is a dedicated CD player. The AH! valved player is a safe choice. I'm sure Herman has a dealer in Germany. If not, you can order direct from him. Personally, I'd recommend the upsampled version.
One last thing that comes to mind is mains conditioning. This is essential for good quality digital. I would invest in a good quality power conditioner or mains filter of you haven't already.
As for digital sounding like vinyl, I'm afraid we are all out of luck there. Nothing sounds like vinyl. You get (sort of) close but digital doesn't seem to have the same 'natural' presentation. Much of that has to do with the state of recording studio production.
I do have to say digital has finally come of age. Quality digital sounds are now very affordable. Not that long ago we had to spend thousands to get that ultra smooth digital reproduction. Now we can have it for under $1k.
Hope that helped.