Any Sega Genesis is a good Sega Genesis.
If it plays
Garfield: Caught in the Act, it is a good Sega Genesis.
I did some quick research, and I guess the Model 1 has the best sound quality, the headphone jack, and the best compatibility. The Model 2 is a generally good second best, but the model 3 does not support the Sega CD or 32X.
Still, any Sega Genesis is a good Sega Genesis.
If it plays
Tiny Toon Adventures: Buster's Hidden Treasure, it is a good Sega Genesis.
I'm sorry, this comic upsets my sensibilities. You've really got me on this one. I'm going to be pacing the floors all night thinking about this comic. It is unbecoming of a truegamergod(tm) and violates the rule of never wasting good tech. Absolutely abhorrent comic, and it pulls The Simpsons into the whole affair. My head is spinning.
As usual, I must ask myself what Garfield would do.
He wouldn't care, and he'd get something to eat.
I feel so zen right now.