I put the 4Seasons compressor on mine on the recommendation of my local car A/C shop. Low defect rate (near zero), and it's quiet. When it cycles on, it barely hits the motor. Until I tweaked the idle control, the engine would actually flare when the compressor kicked on, because the idle-up was too aggressive for these new compressors.
With a new condenser and a 134a charge, I have 38 degrees at the dash outlet in 90 degree weather.
So yeah, don't bother rebuilding the original. It's not worth your time.