Preamp shootout: Linear tube audio, Modwright, etc.

Hi Audio friends,

The world of preamps is taking me down a lot of rabbit holes and I'm curious what everyone out there thinks.  My journey here started with using my Dac direct to amp.  As soon as I inserted a dedicated pre the debate over pre vs. no pre ended.  Didn't realize I was missing a third of the music.  My current rig: wilson sabrina's, Coda TS v2 power amp, exasound DAC, silnote & cardas cables .  I was using a Modwright LS100 and I'm currently trialing the Linear tube audio ref pre.  The LS 100 is holographic, images well, but is not nearly as open or detailed as the LTA.  The LTA is gorgeous through the mids, but is a little muddy through the bass and not really suited for hard rock.  Wonder if different tubes would make a substantial difference to the LTA?  If anyone has experience please share. 

What other options might be considered in this price range?