I looked at the I/50 very seriously, liked it alot...went with the Manley Labs Stingray II...The local Audio dealer by me had them matched with a pair of Atohm Floor standers.
Positives: Impressive across the Audio Spectrum, soundstage, clarity etc
Negatives: Optically for our room, just didn't make it...the dials didn't feel great (although neither did the Manley...I use the remote for sound)...the tubes with the #'s were a little gimmicky for me and hard to read...
From my chair, if your speakers are high efficient, you will be very pleased...Great company, like I said it was a strong runner up...
Best of luck with your decision...