Yo Moe - I was going to recommend you check with Tvad who I know ran those speakers with tubes. I checked, and found out A'gon clipped his wings for the time being. Hope he'll be back soon. I shot him an email and his brief response to the thread question:
Hope that helps.
Marco
Oh...VS and tubes...I'd recommend VAC (maybe the Music Blocks or a VAC Phi), or the Moscode 401HR is also a great match.
Hope that helps.
Marco