Little update... (including audio comparison)
When I went to buy new headphones yesterday (my old sony's stopped working after 10 years). I found a a local music store with good prices and went to check them out. After i found some headphones i liked, i noticed some phono preamps that were on display in the store...
So i started talking to the guy in the store about the phono preamps... and he ends up lending me one of them so i could compare it for myself at home (for free).
I tried this amp for a few hours now, always switching forth and back with my own amp. The real difference i could make out is that the dedicated phono pre really improved the "soundstage". It's like listening to good studio monitors for the first time... you suddenly can hear more details, you can hear better where an instrument sits in the mix, you hear more detailed lows, etc. The sound isn't really more "powerful" or spectacular, but it becomes more detailed, more honest.
I don't think i'm going to buy this preamp (i can keep it two weeks and give it back if i don't want it), even tho it's a clear step into the right direction in my opinion.
I want to see if i can find a few more that i can try out in my setup and compare them. I have a feeling there's maybe something better out there for less money than this particular one would cost (around 300 euro).
The problem with old hi-fi equipment here in switzerland is that you still pay a lot for it usually. There's a lot of thrift stores who are selling old amps and stuff, they have lists online with prices... "cheap" (refurbished) amps are going for around 200 - 1'000 bucks. So phono preamps start at about the same price i'd pay for an old marantz/revox/technics/whatever amp.
Anyway... i've made two recordings with the 2000XL for direct comparison for anybody who cares to check it out (i advise listening to them with some monitor speakers or a pair of halfway decent headphones).
Example 1:
http://www.mediafire.com/?43dp667m7xc2fgoExample 2:
http://www.mediafire.com/?b5mbm9ibuynupm5The song i used for comparison is called "I believe to my soul" performed by Donny Hathaway, written by Ray Charles. Both examples are recorded with the same turntable and cartridge (sl1210MKII and shure VN35E). They are cut off because of the 32MB ram limitation of the 2kxl. I saved them as wave files on the MPC and uploaded them to mediafire without any editing on the mpc or computer. Both wave files are at about the same level (had to lower the rec gain on the mpc for the phono preamp).
I just had a listen to both files. I'm not sure but i think it sounds better when you just "listen" through the mpc compared to a recorded sample from the mpc (after it gets converted to a 16bit wave file by the mpc). Still, the example with the phono preamp sounds better to me... listen and focus on how the instruments stand more apart in one recording (the bass, snares, hi-hats, voices) and how they are more "mashed together" in the other.
My own amp is a Yamaha AX-397

The Phono Pre is a Vincent PHO-8

I won't tell right now which example is the phono preamp and which one is my own amp... it would be cool to see what other people think sounds better first.

PS: You should simply compare audible differences in the recording, not overall quality, since i might need a new needle for the turntable sometime...

"It is no measure of health to be well adjusted to a profoundly sick society." - R. D. Laing