I like the SB3 in principle and in sound. But I don't love the executiom. Specifically, I'm not a big fan of the interface on the SB3 end. I wish there weren't so many steps to go through/submenus/etc.
I have not found them to be harsh. Thin, perhaps. Unresolving up top. All my listening has been under meet conditions, however, so this could be a factor in our different takes.
I also disagree with Zanth's take on the GS1K. I feel like the GS1K is a "defensive" response from Grado. The GS1K, to me, seems to be a response to critics of the Grado house sound rather than a refinement and extension of it. I find the highs to be soft and unengaging (maybe due to Meet conditions, though). I don't know; the GS1K seems to lack cohesion. Does anyone know what I'm trying (maybe unsuccessfully) to say?
I recall Stereophile raving about the Onkyo, but can you find it for $350? I agree with Nate, if you up that budget to $500, you can get something like the Outlaw or a new NAD C-325BEE. I'm a big fan of the NAD (haven't heard the Outlaw).
I'd be curious how the Onkyo sounds, though.
Sounds like you guys could use some sound legal advice. I have been thinking for some time that there is a niche to be filled by Voltron, Tyrion & The Monkey LLP.