I can't really say yet, as I definitely don't have the right tube combo yet. It certainly sounds nice, but nothing could really be worth the ridiculous bs I had to go through. Supposedly more tubes are on the way...
The L3000 sounds great unamped though.
EDIT: I'm running Tungsol 5998's with a Sylvania 6sn7gtb... obviously not the best combo with the L3k.