Prima Luna amp or preamp best speaker -Help

Any suggestions/recommendations are greatly appreciated.
I am considering the Prima Luna (either amp at 40wpc, or preamp at 35wpc) and I'd like to know what my audio brothers and sisters would consider to be a great speaker to match. Needless to say, good sonics, timber and soundstage are most desirable.
My system is: Music Hall ttable, Meridian CD, BAT 3i pre, Aragon 4004 mkII amp and Avalon Eclipse (originals, not classics). I once borrowed a pair of BAT VK60 monos and I loved the tube sound- sweet, glorious midrange, smooth highs, bass was good. Room is 24X13X8', normal furnishing, no audio treatments. I listen to lots of vinyl and CD (60/40%), rock, jazz, bluegrass, world and a little classical.
I doubt that the mentioned Prima Luna would drive the power hungry Avalons, that is why I seek your advise.
My reasons for considering the Prima Lunas are: longing for that tube sound, price for new amp is reasonable, warranty.

Thanks, happy listening!