I have owned a pair of Khorus for over a year now as well as the BAT 31SE. Because the Khorus is more efficient than many other larger speakers, like the Thiels, Avalons, Magnepans, etc., I would shoot more for higher quality rather than higher power.
If you really like the BAT sound, I suggest you consider a pair of the VK60s on the used market....or perhaps even the solid state BAT amps. I have found that the Counterpoint NPS400 is an excellent match. Even a pair of Counterpoint amps would be a killer setup here. But if this is for a HT system where the system is on much of the time, then a lower powered solid state amp like the Pass X150 would be more than enough. So many choices here like the Plinius 102, smaller Goldmunds, etc., because of this speaker's easy drivablility.
If you really like the BAT sound, I suggest you consider a pair of the VK60s on the used market....or perhaps even the solid state BAT amps. I have found that the Counterpoint NPS400 is an excellent match. Even a pair of Counterpoint amps would be a killer setup here. But if this is for a HT system where the system is on much of the time, then a lower powered solid state amp like the Pass X150 would be more than enough. So many choices here like the Plinius 102, smaller Goldmunds, etc., because of this speaker's easy drivablility.