Best speakers for a Pass XA 30.5

I’ve run this same amp with 85db sensitivity speakers with success. It got very loud with still some volume to go. The amp pushes over 150 watts in class B. And no, you can't tell when it passes from A into B.

What a strange question. It's like buying a wedding gown and asking friends if they know any nice girls.

I would personally recommend a pair of Tekton spkrs. I own a pair of Pendragons, and they sound absolutely phenomenal. Nothing gets past em with the amount of detail they deliver. Pass Labs amplifiers sound amazing through Tekton spkrs. I’ve heard a Pass XA-25 through them, and I was truly blown away. They’re very efficient too at aprox 95-96 dB, which Pass and First Watt amps seem to like.
You can at least call Eric Alexander and talk to him about recommendations. He’s very helpful, friendly, and most importantly honest.
I’m not sure what shipping to Italy would be, but the Tekton line of spkrs is alreamdy very reasonably priced.
It couldn’t hurt giving him a call.

If you're looking for bookshelf spkrs that deliver a big Soundstage, I’d also check out Buchardt S400’s. 
They’re made in Denmark, and I believe the shipping is free with a 30 day return policy, which is also free to send them back. They’ve been getting rave reviews, and they even sound good on certain YouTube vids too, which is rare. 

- Nick

What a strange question. It's like buying a wedding gown and asking friends if they know any nice girls.

Agreed.  You should always find the speakers you like first, then get the amp to match.  Pretty critical interface.  Seems backwards to me...