I've owned the Roman Audio Centurions for well over a year now and love every aspect of them. You mentioned that you feel they are quite expensive for a two-way speaker, if you spend any amount of time with them. I think you will find them well worth the money. I have seen on many threads, here on Audiogon, about people wanting to add subs to their 2 channel system. The 8" driver in the Centurions plays low enough that it can easily handle the lowest tones of a pipe organ. After I had these for a while and got real familiar with them, I stated going around to hi-fi shops and listening to other brands, just to compare, and nothing that anyone had on display would come close. IMO, these simply blow-away the B&W 802's, which is a very popular speaker. As far as the imaging goes, they're like the other, one you find the right positioning in your room, pure heaven.
The one thing that you have to remember, like any other high-end speaker, if you run entry-level components and cables, you won't hear the full potential of these speakers. If you have any questions, or would like recommendations, call Roman Audio and speak to Mr. Fontenot. He has been a tremendous amount of help to me. If you would like, feel free to e-mail me and I will help in whatever way I can. I personally don't feel that you can go wrong with these speakers.