My first impulse was to say your amp outclasses your speakers, especially with the music you tend to listen to, but if those speakers really do it for you then screw what I think. I had the RLD (and have a DNA-0.5 RevA) in my system for a bit and it's not the most transparent pre in stock form. If you're married to your speakers I'd look at an SMcAudio upgrade on your RLD or maybe a better preamp.
Maybe if you can expound a bit on what you like about your system and what you'd like to improve upon we can give you better and more specific recommendations here.
Maybe if you can expound a bit on what you like about your system and what you'd like to improve upon we can give you better and more specific recommendations here.