The nicest processing I've done so far was with the Rodinal/Tri-X combo : even if with low contrast films such as Orwo UN54 Rodinal isn't active enough and the result is quite grey, with a contrasty film such as Tri-X Rodinal gives great results : clear whites, nice darks and a good tonal range. I didn't achieve such nice results with Foma LQR, but perhaps it is because I haven't found the ideal dilution/development time combo (it always lacked brightness). Just try both yourself and see what you like best