Thy Cross, we Adore by the Romeiko Ensemble is extremely Byzantine with full blown ison and its amazing. At then end of the CD, they chant "Thy Cross" Ton Stavron sou in english, greek ,romanian, arabic, french, slavic, and even Latin in Gregorian chanting. The rest of the CD is all traditionally Byzantine.
Another good one is Paraklesis to St. Nektarios by a monastic community(?) I think in the States. I'll provide the link a littlr bit later on today of where you can purchase it.
and of course the Eikona CD's are always good.