I would think the higher powered amps woule be a better choice;Manleys,vtl's,quicksilvers,and Audiovalve would be on my list.
I run Audiovalve Challanger 180's on my soundlab M2's with excellant results;what is nice with these amps is it allows tube mixing and matching as it is autobias.(el34,6550 and kt88 capable)a nice option for custom sound if you want to play.
I would think the SL3;s would be a good match at least on the panel portion.