A couple of weeks back a friend tried to find the IQ7s in NYC for an audition. She had no luck, but didn't try 6th Ave. She ended up buying the Iq7s blind from Vanns, figuring that in a worse case scenario, she'd just return them. I own RTi8s, but given that I've listened to her system for all of about 10 minutes, I'm very hesitant to give any comparisons on the sound. I will say that I think the KEFs are very well made (as are the Polks) and for the 10 minutes I listened to some jazz material I had with me, sounded excellent. In particular the imaging stood out. My RTi8s seem to have a bit more on the bottom, but again the IQ7s need to be broken in and this weekend's project is to check speaker positioning, mess with the port plug, etc... Suffice it to say, I think both the RTi8s and the IQ7s would benefit from a sub. Sorry I couldn't be of more help.