I haven't heard the Proac but when I was on my speaker search I auditioned the SF Cremora M's and thought they were quite good and a little laid back but a tad pricey (what isn't). A couple of weeks later I met a new local Dynaudio dealer. From the minute I heard the C1's my speaker search was over. Pretty much the same price but there is something really special about the Dyn's. Also the dealer is a Naim dealer and that is one sweet combo. Sorry but I haven't heard the Ayre either. I've had the C1's for about 18 months and just love them.
My room is close to yours and have my system on the long wall too. I do have a Rel B3 sub which adds the right weight to the music when dialed in. That being said it wasn't until I upgraded from the stock Rel cable to a Nordost baseline (Rel spec) did the magic with the 'sub bass' match up with the speed of the Dyn's.
You seem to have nice choices and if all possible try to audition them in your home in your room.
My room is close to yours and have my system on the long wall too. I do have a Rel B3 sub which adds the right weight to the music when dialed in. That being said it wasn't until I upgraded from the stock Rel cable to a Nordost baseline (Rel spec) did the magic with the 'sub bass' match up with the speed of the Dyn's.
You seem to have nice choices and if all possible try to audition them in your home in your room.