Seamaster. I picked up the 8500, it has more power than the 7500, about 25 wpc at 8ohms according to Hitachi, although that may be a bit of a stretch. It's better than the 7500, which is a really nice amp, but not a major upgrade. I also have an HCA 6500 that is a very nice pre, but not the equal of my Yamaha c4. All in all I must say that Hitachi made really good gear, that seems to fly under the rader.
