VAC Renaissance Signature Mk V versus Allnic L-7000?

I currently have an all digital system, with an MSB Discrete DAC running direct to a Pass Labs 250.8, with Wilson Audio Sabrina X's.  Having read in several places that a good preamp would be better than the DAC direct to the amp, I have been contemplating putting a good tube preamp in to get better soundstage, realism etc.  I am going to audition the VAC in my system on Monday.  However, the Allnic seems to be a great and unique preamp as well, but I have no way to audition one. Any thoughts on how these two excellent preamps compare and might work in my system?