I want to get the new XPA-5 to power my av123 750's & bigfoot & I'll even run the rs300s off it too. Probably overkill but it's like there's an uncontrolable urge to do it. I want more power. I'll just use the yammy rx v659 as pre-amp. I would probably be just as happy with an LPA1 but those 200 watts are just screaming at me to buy it!