Tubeyist sounding Pre-amp?

chayro, it's mastering and recording engineers that want sound to be maximum of neutral. audiophiles aim for euphonic coloration that is often far away from original source.
Viva amp is extremely audiophile.

Chayro, I like the sound of Viva gear.  I have a Viva fono phonostage myself.  I checked out your profile and found that you have a Trenner & Friedl speakers, a brand I like too.  We also share the same brand of turntable.  It must mean we share the same notion of "euphonic coloration."  But, that description merely means we like the sound of whatever we attach that label.  There are plenty of tube gear I would not call euphonic and many of these are the most popular brands (at least as far as internet hype). 

yes, euphonic - a warm sound (upper bass, lower midrange prominence) and LIQUID 

the pre-amp now is a Sonic Frontiers with a Sunfire Cinema Grand that is bi-amped into Maggies

Cary SLP98 for sure. 

Obtain the tubed pre of your choice, then load it with either Mullards or Brimars(British valves/NOS, NOT repops). British tubes are generally quite euphonic(warm/caramel flavoring). There are a plethora of excellent 6922/6DJ8/E88CC types out there that should even enable you to adjust your Sonic Frontiers pre to your tastes.