What tubes are you using? On stock tubes, I find the HD800 'okay' at best. With Tung-sol 5998 and RCA 5693, I find it un-listenable. Regardless, with each and every tube configuration on the LF339, I still preferred the V200 over it when it came to the HD800. Give it a try some time!
Violectric V200 is an absolute winner with the HD800. Tames the treble spike and has amazingly high resolution, while giving a slight hint of warmth needed to the vocals in order to generate that 'musicality' versus the analytical sound. (personal preference here).
How do you rate the bass response with the v200?