I own an RS410 that I really like, and I have played through a colleague's RS210 a few times and thought it was a really great cabinet. I haven't had a chance to play through the K series at all. Any of the shops around me who carry TC will order either of them in, if I put down a deposit and commit to buying them. If that is what I have to do I would go with the RS210 that I am familiar with, but if the K series blows it out of the water, they retail 300 CAD cheaper here. I hesitated on buying one a while ago when money was tighter, and now I'm kicking myself because the RS210 has shot up in price significantly. Has anyone had a chance to A-B these two cabs? Thoughts?