Personally, I think worrying about the chipset rights is a bit silly as the all the patents have lapsed.
Also, the Amiga name has been polluted and the reputation dragged through the mud.
I'd take the money and talk to Treavor about a new MorphOS machine with JIT support for UAE.
PPC or ARM? I'm not sure. 68K? Why? At 100MHz that is still DAMNED slow.