I've had "great success" with the FMR units. The RNC was fairly transparent in supernice mode. The RNLA imparted a nice vintage tonal color to the bass. Both also have a neat TRS I/O for patching via Y-cables. There's a dedicated rack mount as well. Check Mercenary Audio for this. Power is on a wall wart, which may be a PIA, but their small size, price/quality more than make up for it.
I'm not doing splitting with the Rick.
Sold the Optostomp cause I wanted room on the board and could always get a rackmount compressor.
