New DAC?

Ok- so I have a Wyred 4 Sound DAC 1 that has factory mods- low es caps from the DAC2 and a Femto clock. Very nice DAC indeed. Say I want to up my digital game considerably. I've heard the Bricasti M1 and do think it's a home run. Short of the M1 where do I go from my Dac1/2 hybrid?