I'm sure this is all very confusing with the conflicting advice, so here's some more to make your head spin.
1) No food is worth driving to New Haven before or after the game.
1b) That being said the Pepe's in West Hartford and Manchester are both overpriced, lesser quality version of the original and are worth avoiding
2)For my money the best eating in the greater Hartford area is in West Hartford. It sounds like you want a sit-down meal over a tailgate experience, so if you go to the intersection of South Main Street and Farmington avenue (Called West Hartford Center) you'll be able to walk around several sidewalk seating restaurants and pick the one that best suits you. Within a 5 min walk you can choose from:
Lasalle St:
Briccos- One of the best Italian Restaurants in the state
Max Burger- A Gourmet burger joint (like the plan B others are mentioning)
McLaddens- Irish Pub
Farmington Ave:
Grants - A high end stake house that is probably a bit more pricey than its worth but still good
Ichiro - Hibachi and Sushi
Max's Oyster Bar- High End (but seafood so probably not your bag)
Barcelona - Tapas and Wine
Bar Taco - More Bar'ish ala carte version of Barcelona
Arugala - Small setting Mediterranean
Treva - Up Scale Italian - but if you are going to do italian do Briccos
South Main:
Blue Elephant - Best Thai food in the Area
Besito - High End Authentic Mexican - Great meal! Ends in Warm Churros, guacamole cart
Flemings-Another steak house but have never tried it to be honest
Blue Back Square:
Cheesecake factory- Dont go, but just in case
Rizzutos- Another Italian joint - Go to briccos
For Desert you've got your choice of Sweet Frog (self serve froyo) on south main, Ben & Jerry's (right next door on south main) and Pink Berry in Blue Black Square.
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