No experience with 805's, but have owned 1505's and 1005's both with dual 288's. The sonic mids to set the standard. Heard fingers and fingernails on guitar strings and bass strings that I didn't know existed on some recordings. I think that your idea of a tweeter in a cell was a great idea. If you get ten cells two over one down crossed right in front of you, would be the key, Got any slots ???