Speaker for Mcintosh MC 30

Hi Guys
I have recently acquired a pair of Mcintosh MC 30 Tube Monoblocks. These are under restoration now. They were in working order when purchased, restoration is mostly cosmetic plus new tubes. My guy says to use EL 34 but I am not convinced. 6L6 are also avaiable. Maybe will try both. The question is what speakers. I currently have a pair of B&W 805S in Tiger eye maple with matching center in my HT and B&W 800D1 paired with Krell KRS 200 monoblocks. I will ocassionally use the MC 30 with these speakers but would rather acquire another set for these for a seprate room. KEF B&W are avalable. Klipsch also but not everything. Do you think the KEF LS50 would pair with these well? Any options on Klipsch?
Thanks