What is the latest greatest USB add on device?

Love the IFi Micro USB 3 with a good linear power supply for it. Nice improvement in my rig. Less noise and greatly reduced digital artifacts. Music flows more naturally with improved musicality. Also need a couple of good USB cables with it.

Thanks grannyring for your comments. I was beginning to think that no one is using USB .
Has anyone tried the newer version of the Regen called the ISO Regen?
ozzy

well I'm sure its not the latest or greatest but I've been using a Schiit Bifrost 4490 USB DAC with a Schiit Wyrd USB regenerator streaming Spotify premium from my MacBook Air and I am pretty satisfied with it. Been in this hobby for 40 + yrs. and have tried a lot of systems along the long and winding road and am just enjoying the music these days.  the only item I may add is the Schiit Eitr USB to SPDIF converter.......hmm.

Thanks radiomanjh,

I found a used ISO Regen on the gon and just bought it. I am going to wait to upgrade to any $$$ power supply until I asses the usefulness of the ISO Regen.
Anyone have experience with the ISO Regen?

ozzy