I wouldn't call them dead yet - MLS mentioned on the AV123 forum that he has another 230 SP3's in China. He hasn't yet said anything about discontinuing any of the models (although it wouldn't surprise me).
I'm just reporting what it said on the detail page for the higher power SS integrateds, and although the SP3 is, I suppose an integrated, it's pretty limited in the number of inputs, controls and such, so I didn't figure this person was looking for something like this.
If I had the room and the need, I certainly would consider getting an SP3, but I'm kind of maxxed out on gear now except for a decent tube pre.
-- Jim