Tekton Seas Pendragon amp recommendations?

I just ordered a pair of Tekton Seas Pendragon and I'd like to know what owners are driving their speakers with including opinions about quality of sound performance.

I'm going to play around with a few options.

I have:
Yamaha M-4 (120 WPC @ 8 Ohms & 170 WPC @ 4 Ohms)
Emotiva Mini-X a-100 (50 WPC @ 8 Ohms & 80 WPC @ 4 Ohms)

I'm considering:
Bottlehead Paramount 300B (8.5 Watts each)
Schiit Ragnarok (60 WPC @ 8 Ohms & 100 WPC @ 4 Ohms)
Odyssey Khartago (110 WPC @ 8 Ohms)

I'm sure I can get better fidelity out of a nicer amp than the two I have. I like tubes, so that's why the BH. I'm also curious about the circlotron design of the Ragnarok.

The Seas Pendragon are quite efficient at 95db @ 1W/1m, so they don't need a lot of watts to get loud. I'll be using them for mostly analog stereo hifi audio playback, but sometimes digital audio as well.

-Robert