I'm very pleased with my Adcom GTP-400, the successor to the GTP-500. The tuner required alignment (which I did by ear, so it probably isn't even up to its full potential) and replacement of several trimmer caps. But the preamp works fine even if the tuner isn't repaired (might be able to get a great deal on eBay if someone is willing to advertise that their tuner doesn't work).
I haven't used the phono stage.
Best headphone-out I've used so far, but I haven't tried any of the standard recommendations here. 12Vrms preamp, if I recall correctly, in case your amp needs help (I initially used the GTP-400 with a 9-watt tube amp).
The tuner lights are on all the time, and are bright, which sometimes interferes with quiet, in-the-dark listening.
Overall, I have no problem recommending this unit if you're willing to deal with repairs to the tuner--or a broken tuner.