VTL 2.5i vs PrimaLuna Dialogue Premium

I have my preamp search narrowed down to these two; however, I'm unable to audition either in my home.  I'd be interested in reading impressions from anyone who's heard both.  I'll be using it with an Aragon 4004 mk ii power amp.  Thanks for any input.
I have had a PrimaLuna Dialogue Premium Pre for a little over a year now...  I have had no problems or issues with it...  I love it...  It fronts for a McIntosh SS amp driving MartinLogan ESLs...  It makes beautiful music...  I have no experience with the VTL but it looks like a totally different kind of design with less tubes and a few more "bells and whistles"...  Good luck in your decision...