which Audio Research pre-amp?


I've pretty much narrowed down my next pre-amp purchase to an Audio Research 6 or GSPre.  Ultimately, this will be paired with an Ayre VX-R.  For the sake of marital harmony I need to spread the purchases out over a few years.  
Is the 6 that much better than the GSPre?  I like the idea of having an integrated phone section but I read that the 6 / Ref 2 SE combo. blew away the phono section of the GSPre.  I don't listen to vinyl that much.  My current phono pre-amp is a Pass Aleph Ono.  thanks.
russellrcncom
I recently picked up a clean GS150 amp and my choice for a mating pre is a new Ref 6, which should arrive next week. I know they say the GS150 and GS Pre are styled to go together but I always see the GS Pre as being upside down. And I already have a separate phono pre so the Ref 6 it is for me. 
@stlyde,

Congratulations on your recent purchase. You made a great decision to go with Ref6 over GSPre. My dealer told me that GSPre performance rivals the LS28. The REF6 is a definitive upgrade over GSPre or LS28. I went from LS28 / VT80 combo to REF6 / GS150. 

Once you’re settled with the new combo, I highly recommend to upgrade the stock Sovtek 6550WE Tube to SED 6550C Svetlana -C- / Russia Tube. This upgrade yielded tighter bass and more meat to the bones to overall soundstage. 

To my ears, 6550WE Tube had bass less defined and fat, YMMV.