WARNING: Tube/Valve amplifiers use potentially LETHAL HIGH VOLTAGES.
Building, troubleshooting and testing of these amplifiers should only be
performed by someone who is thoroughly familiar with
the safety precautions around high voltages.
One of my RIAA stages is the Vacuumstate Dave's linked in the post above and it's outstanding. I've also built the linestage from the same schematic and it's excellent too.