Had to read the OP a couple times to make sense of it. The sound stage is narrow- but extends beyond the speakers. Okay, that is not narrow. The sound stage is detailed and precise but not deep. Well that is largely down to the recording. A lot of them are just about as you describe. Some further forward, some with greater depth front to back. They are all over the map.
These are horns we are talking about. Not a big horn fan, you will have to ask someone who actually used your speakers to know for sure what they are capable of in this area. Also a lot of things like Townshend Podiums and Pods, Synergistic HFT, etc will make big improvements in all the areas you are looking for. Whatever you do, do NOT go multichannel, you will find yourself immersed in pure dreck.