Manley Variable MU Stereo Compressor/Limiter - all valve, transformer balanced I/O, high end compressor/limiter, unbelievably versatile audiophile quality unit.
Empirical Labs EL8X-S Distressor - stereo pair with British mode and Image Link. Contains 2 separate mono channel distressors, which may be linked. Classic knee compressor, tube saturation, opto simulation, XLR...