How do you have your Droplet cdp hooked up?

Having owned a Opera Audio Droplet for a little over six months now, I was just curious if any other owners out there have experimented with running direct (using the variable output control) vs. using a high quality preamp.

I have always run mine direct, and am generally pleased with the results, but I guess I'm curious if putting a good preamp in the chain would "gain" (pun intended) me anything?

Thanks to any & all!