Herron VTSP 2 or First Sound PreAmps

I am considering going towards a tube pre-amp and the two pre-amps that i am considering to match my McCormack DNA 225 Mono blocks (upgraded by Steve) are the Herron's and First Sound.

I am looking towards getting more separation among players and instruments as well good overall tonal balance with more body.

my current set-up gives me quite a bit of all this at the moment but it is on the lean side.

I am traditionally a SS person but after hearing a friend's set up with tubes...i am now thinking of a tube pre.

I have heard the Herron at CES but not the First Sound...has anyone paired either of the units to McCormack gear...are both these brands at the same level of sound quality...

Also in terms of maintenance of these tube units...which is a better bet.

the rest of my system may be seen when you click on system.

Thanks for sharing...