I own a pretty fair sized collection of good quality vintage preamps,and currently use(and love) the Dynavector P-75(the original,
not the newer improved P-75 Mk II).
My collection of phono capable preamps include
Kenwood Basic C2
Yamaha C2x
Onkyo P-303
Kenwood 700C
Echowars modified Kenwood 700C
Since my cartridge is the
extremely low output moving coil Dynavector Karat Diamond 17D Mk II(again
not the newer improved 17D Mk III),I can't really tell you about the phono stages of the Kenwood 700Cs since they aren't configured for low output cartridges(or the impedance matching necessary for most moving coils).
So that leaves any real assessment I've done of these preamps with their own phono stages,down to the Yamaha,the Kenwood Basic and the Onkyo.
Having the Kenwood 700C,on hand meant that I used to use the Yamaha C2x's phono stage(via the C2x's tape out sockets).
By taking the phono signal of the Yamaha C2x from the tape-out sockets,the signal didn't have to pass through(could bypass)the tone controls,the balance pot,the headphone socket and the volume control.
When using the Yamaha C2x's phono stage via it's 'normal' dedicated preamp outputs,the signal went through all the above,and sounded inferior to taking it's phono signal from the tape-outs.Of course,to have any use then of what one was getting from the C2x's phono stage,another preamp was necessary.
I'm certain that if the other preamp wasn't of the quality of the Kenwood 700Cs(EW and stock),it wouldn't have been worth it.
Of the low output moving coil capable preamps I've got(used from their 'normal' dedicated preamp outputs)the best I have here is the Onkyo P-303.
The Dynavector P-75 is a better match to my cartridge than any phono stage in all of my preamps(that's hardly surprising now isn't it).
It can't be said that it was designed for my cartridge as the cartridge's first original model was released in the late '70s(?),and the P-75 phono stage only came out in 2004(?).However there are design elements in the Dynavector cartridge range which make them capable of using the 'Phono Enhancer" mode of the P-75.
When I got hold of the Onkyo P-303,I posted a lengthy(boring) assessment of it's phono capability,which impressed me.
http://audiokarma.org/forums/showthread.php?t=105181&highlight=onkyo+p-303
Here's hoping you didn't feel the urge to commit Hara-Kiri after reading that. :tears: