A tube amp is an option but I have a pair of Triangle Zerius 202's and I think they can be a little tipped up but I was running them with both an Antique Sound Labs KI-22 Fox amp, (single ended 22W), and later a Plinius 9200. The Plinius smoked the ASL amp. There was, (as you'd expect), much better bass control, and much more to boot. I realize that the Plinius is relatively expensive for the speakers but any perceived brightness was gone with that combo in my opinion. When I sold the Plinius it was a sad day. My point is that with system matching I was very happy with the tonal balance of the floor-standers and I would bet you could be too.
Hope this helps, YMMV, FWIW, EIEIO
Hope this helps, YMMV, FWIW, EIEIO