Revel and Tubes ???

I own the Revel M20 which are, imo, great speakers. They provide a sense of presence and scale which is rare among monitors - specially on its price range.

I've been driving them with the Plinius 8150. I've introduced some improvements on the system, regarging cabling and power (Power conditioning and PC). Through this process it becam increasingly evident that I am listening to the electronic signature of the amp.

I listen mainly to classical music (chmaber music, baroque, ancient) and acoustic Jazz.

I guess I should try tube amplification ... so the questions are:
1 - Does anyone has any experience driving the M20 (or other Revel Speakers) with tubes? Do they "like" tubes?
2 - Which options should I consider? I would prefer an integrated ... but maybe I could try a pre/power combo from ASL (known for its excellent value) or watch the 2.nd hand market.

Thoughts? opinions? suggestions?

TIA,

Vermeer