Does anyone own a VAC Renaissance mk5 SE Preamplifier?

I was wondering about the VAC Ren mkV SE Preamplifier.  It's not listed on the VAC website but I've seen a few dealers advertise it.  Is it a significant upgrade from the Ren III? Does it have both input and output transformer coupling? My Ren III sounds quite good. All opinions are appreciated. Merry Christmas!