You might get more assistance by making a new thread 😉
Anyway, not too sure about a Genesis emulator. The fastest PowerPC Mac Mini is a 1.5GHz PowerPC G4 from Late 2005. The fastest PowerPC laptop is the 1.67GHz PowerBook G4 (15in and 17in models) from 2005. The late 05 models are arguably the best PPC laptops ever made because of their beautiful displays, double layer DVDRW optical drives (DL SuperDrive/DLSD), and their high speeds.
Funny I downgraded to Tiger last night, and this on my quad G5. Leopard looks better but the added bloat started to annoy me. I find Tiger to be more responsive and less 'in the way'. And I don't need Time Machine, etc.
North west missouri. I'm in north of kansas city in the plate city area.
EDIT: they look good to me but, the stainless steel on blue and white theme with Tiger still seems contemporary to me, at least if you don't consider your self a die hard fan of the flat shading most softwares and OSes use these days.