Atma-sphere M60 II.3-Any good for 4 ohm speaker?

Guys, I like the idea of trying OTL, but, in looking at the mfg. web page, I see the power rating going down to 40 watts for 4 ohm load, and going up to 80 watts for 16 ohm load. I am receiving my speakers next week, and they are 95DB with a 3.8-4 ohm load(Reimer Tetons)What do you think of these amps with a 4 ohm speaker. Also, why does the power go down, not up?

Thanks in advance