I am currently testing a SOtM tX-USBultra USB Audio Reclocker on behalf of a friend.
So far there's plenty of additional detail at the expense of being a bit shouty but I'm sure that'll work itself out during the burn-in.
Remember you'll need an additional LPS & DC cable approx $1k.
I'll need about another week to fully assess but I'd say this is probably a keeper but besides the LPS an additional quality USB, clock and power cable will be required.
So that's a total of over $3-4k for the SOtM.