Intergrated tube amp recommedation for B&W703's

Just yesterday I've heard an intergrated tube amp from an Italian manufacturer at a local shop in Grand Rapids (sorry, I didn't write down the name) and was highly pleased with the sound. I think it only put out somewhere around 20+ Watt and sounded wonderful to me.

This got me thinking again about replacing my current amps and try out tubes, which I never have tried before.

Do any of you drive their B&W703's with a tube amp? If so, any recommendations you could make?

Currently I have a Musical Fidelity pre and a pair of Electrocompaniet AW220's.

I might replace the 703's with a pair of PMC OB1+ speakers if I can find them for a fair price. Think the sensitivity of the OB1+'s is lower though then the 703's I currently have.

Would that still work for a tube amp? I don't usually play music at overly high volumes if that helps to know.

Thanks