Sounds like you have some pretty nice stuff. I use lots of individual boxes that I personally own at my place. I agree that you would find a denser/thicker tone with a nice analog outboard preamp. Are you wanting coloration or neutral clean clarity? Don't count out API or the Vintech 1272, the DW Fearn gear is cream. GML also...lots of world to explore. I would go for the Distressor first and foremost. It's very versatile and is the all around "swiss army knife" we all love it for. Good Luck!