I run an AE212 w/ mine. It's a somewhat more modern tone--less warm bloom and tighter low end than either one or two Scout cabs. For retro fingerstyle in trios, I prefer the thicker (but less defined) Scout tone. OTOH, the busier the arrangements the better I like the WA/AE212 combination.
Makes sense - fatter is better with a trio generally speaking.
Thanks to all for the input so far, I'm getting a pretty good sense of what the WA is all about. I'm not really into the glassy/sheeny/uber hifi thing - I like a little fat on my beef, thank you. Will definitely be checking one of these out.