Go vertical.
I have a biamp set up and I use solid state for the bass drivers and tube amplifiers for the upper drivers. I use MC 901 McIntosh monos to achieve this. It’s working out really well for 802 d3 Bowers speakers. It’s definitely a lot of power. Maybe I could achieve the same result with 300 W mono tube amplifiers and be just as happy without the biamp. But I’m very happy with what I’ve got.
You’re got very sensitive speakers and I suspect Will have no problem using tubes for the bass drivers.