All depends on what YOU are looking for out of your car while cruising...

Just to cruise and enjoy yourself with the occasional stomp - 3.23's

Cruising more locally with more stomping - 3.73's

The choice is yours
I have had 4.56 in my challenger...that did not last that long....I was tached out at like 50 mph

I run 2.76's now and it just dogs too much, but on the highway it keeps going and going and going...which is nice to drop the hammer and hit trip digits