Cant' comment on the i7 but I have just had the i9 - XR on trial for 3 weeks, playing through a pair of Neat Motive SX2's. I have to say that it is like a Cyrus but more so! I agree with Ed about the soundstage not being massive but it is absolutely rock solid.
It does need running in however, probably 3 days of solid running. In the early days I have to confess it was a bit bright, especially with the Rega 6 Ania combination.
I am trading in my 82 DAC on the strength of my 3 week trial if that helps anyone!