best integrated amp.

REGA Osiris

I have listened to the 1.7s with many amps including a small Cayin tube integrated and that even sounded nice. but throw an amp with some muscle behind it and they become great speakers. I've not heard this piece but owning a couple of their preamps I'd look at the ModWright KWI 200 as well.

I currently have the Hegel H300. Very nice. 

i have seen a mf nuvista 800 lately for $7500 a serious amp for the cash .12k new stereophile raved over it .

Agree with the Hegel H300, have had mine for 2 years and it steps up to new levels depending on the speakers. I just demoed with Sopra No.2 and its the best the Hegel ever sounded. I like an Integrated that has the next gear when required. I suppose the Hegel didn't perform any better the Sopra's simply let you hear what the Hegel can actually deliver. That to me is a good investment piece.