Good to hear and you should be happy with it :.)
It is a great amp for the HD800. May be not the best, or best value for money, but a great amp neverteless. Based on some discussions here on the forum, I bought the Auralic Taurus mk2 amp and additioned the Violectric 281 with my HD800. And yes, I must agree, both are "better" but don't expect a "zero to hero" difference.
In fact, the funny thing is... The HDVA600 is smooth (if not overly) and compared to the Taurus it misses some slam and bite. Still, I can't let go of my HDVA600. Sometimes I want to hear that smooth sound and that kinda sucks because I can use the money :.)
* everything above is a personal opinion and must be read as such.