SHL5+, Zu, Orangutan?

Hello, looking for advice or at least a good discussion.  I currently own SHL5+ run by a pair of MC275s.  The only source is an Esoteric K-07, no pre.  I love these Harbeths, but I am always wondering what else there is.  Additionally, I used to have them run by a Pass XA-30.8, which I think was probably the best amp for them.  The MC275s seems to run out of gas on very dynamic recordings. Anyway, I heard Zus a few years ago and was blown away by their realism and presence, particularly at low volume.  I have also always been intrigued by Orangutans.  I heard them at APOXNA and they were lovely.  My room is 16'x11' with 9' ceilings, 3 drywall walls and 1 brick.  I listen to rock:jazz:classical.  I am hesitant to start buying and changing and selling etc, but I always have that itch.  Should I try some Zus or the Orangutan?  Will they even work in my room?  Keep the Harbeths and go back to a Pass?  Or just enjoy what I have?  Thank you.