Living voice and kondo

Wyetech Topaz would work very well also.
A couple up for sale right now...but not my own!

You have to keep in mind that the difference between 10wpc of amplification and 20wpc of amplification is only 3dB of SPL headroom. Whether that last 3dB will be important to you depends a lot on the size of your room, the style of music you prefer and your preferences with respect to peak decibel levels when listening.

You really can't speak in absolutes here unless you make the assumption that the system will be asked to reproduce a wide variety of music - including something like rock, pop, or orchestral music that will definitely benefit from the added headroom - in something other than a small acoustic space.

For ultimate drive performance, I do recommend folks here to try pairing the OBX-R2 with a 50w SET,
such as KR Kronzilla SX, to undestand the speaker full potential with all kind of music: drive ,stage,authority and energy from hell combining midrange from heaven.
Although this match must have a very liqiud full bodied source (prefered analogue & tube phono) since the KR has a very neutral balance.
But there are some good 845 SET/300B PP that will drive them very good as well, but again, this speaker deserves the best cables and source to full potential- they are more sensitive to that then other designs on the market

Ef227,I am using Kondo copper speaker cables and resolution audio CD player,by good 845SET/300B pp amp which you mean

I'm using a Luxman L560 50wc Pure class A amp with my LV Avatar 2's with great results so don't rule out a good SS amp preferable class A. I also have some Welborne labsDDR45's mono's that sound great but not nearly enough power unfortunately (2wch haha) but I do prefer them with the tubes but there is good SS out there that will make them sing.