I agree with John. I think the 80s would be overkill in a room that size.
Just realized I didn't like that last sentence. If you like it loud and want it, it's unfair to call ANYTHING overkill. A better way to have put it would have been to say that the 60s are plenty for that room, and I don't think any difference you'd notice with the 80s would be substantial enough for the extra money you'd be spending.
I'm not familiar with your receiver so I can't say if it would handle the 4 ohm load of the 80s. But, that's something you want to be sure of before you go that route.
I gotta remember not to criticize other's desires or preferences. DUH!
