Jolida JD100A, How to bring it to the next level

This is the story. I just bought a JD100A with some basic mods done to it. I want to bring it to the highest level. I know this sounds a bit quick (who knows I might like it after I actually hear it), but I would like to get the most out of this player. Should I have it sent out to hotrodaudiomod, Odyssey or others for the level 3 upgrade? What tubes do you find really shines on rock and jazz? Ok guys.... bring on the opinions!