Does anyone know when the new Onkyo TX-SR500 receiver will be released? I've seen reports of April but we're in April and I'm curious if it will actually be released this month. Also, does anyone know if this receiver has a "tape monitor" loop for connection of an external equalizer? It's my understanding the 595 has this, I need this, and am wondering if the TX-SR500 and TX-SR600 have this capability. If not, I'll likely try to get a good deal on the 595 on closeout.