I agree with Solude on this one. I've only heard the WA22 from the two mentioned but it sounded great with the T1, which is what was available at the time. No time with the HD800 unfortunately, but I've owned the WA2 and in comparison, there is an upgrade - but not as much as the increase in price would lead you on to believe. I don't want to speculate on the WA5, but from reviews it seems like an amp that is worthy of consideration. Overall it's still widely known as overpriced (new). If you can land one used for a good price, I'm sure it will impress you. You seem to really enjoy the Woo signature sound and aesthetics (beautiful amps IMO), so I don't think it will disappoint. If you really enjoy tube rolling you might want to look at ZDSE or even a regular ZD. I really love Woo, but their prices are a bit steep for the performance you get stock. You have to front half the cost of another amp (tubes) to find the sweet spot. Maybe even give a go at a used LG if you can find one.
Edited by Greed - 9/22/13 at 2:22pm