This one is easy. In no particular order:
The Tap Room (queso burger)
Ancho Grill (in the Pac N Sac @ Wonderworld) I know that sounds weird, but trust me, the burgers are good.
The Tap Room is my favorite cause I like their buns. I can't say anything about Grin's because, truthfully, that place has never impressed me wth anything.
Red Robin is overpriced and not all that. I won't be eating there again.