I've been admiring your site and your generous engagement with the community over a few months.

Now I'm interested in replacing my very inefficient Thiel CS3.6 speakers with a pair of your Pi Fours or Pi Sevens (and moving to smaller amps - possibly Bottlehead Paramour II eventually, but my Music Reference RM 9 initially). My living room is populated with built-in bookcases and a grand piano, as well as couch etc.

It seems from other posts that the Pi Fours are more flexible with respect to room location, but that the sevens will yield better sound if they can be made to work in my room. Am I right in that conclusion? Or is the seven mostly about increased efficiency?

My dilemma stems from the fact that my only available corners currently have built-in bookcases on one side each, and a baby grand piano arranged between those two corners with seating opposite. Is it reasonable for one side of the horn to be up against the bookcases, or would I need to build a mini-wall to complete the horn loading? If so, how big? This placement would put the horns back with the piano sort of sticking out between. The wall is about 15' wide (the speaker wall) and about 18' deep. Ceilings are high - about 10-15 feet (sloping).

Or should I just stick with the Pi Fours and give myself more choices?

Thanks for your help,

tim