Where would you go after Wilson WP7?

I have the Wilson WP7's paired with Krell 300MCX monos, Krell Home Theater Standard 7.1, Velodyne 18 with SMS-1. I am sure the good folks here would have some opinions on an upgrade, what would you do or just be happy?

My room is small 9' wide, 8.5' ceiling, 16' long. Room may have a tad more sound treatment than needed but at high SPL works very well.

Likes: I prefer concert level volumes appropriate to the music. To that end the system has very fast, tight bass. Actually its really good. No distorsion at 103Dbs. Good to very good imaging.

Cons: Highs are bright or hot. very directional so very small sweet spot.

Can anther speaker sound better given the smallish room?

Thanks!