I have an 07 V6 Accord Coupe and I love it. The gas mileage comments are bogus...I average 23-25 MPG in 50/50 driving in summer and just took a long trip...3 tanks yielded 28.5, 30, and 30 MPG traveling between 70-75 MPH. That's pretty good for 244 horsepower and a 0-60 time of 6.6 seconds. The car has very few issues I know of. In 2003-04 the transmissions had problems but were rectified part way through 2004. This was clearly shown in the last issue of Consumer Reports auto buying guide (black mark 2003, half black 2004, top rating from there on out for trans).
Other than that the rear brake pads can go fast due to the brake distribution system that routes more brake force to the rear in normal stops. Some people have front rotor warping issues, which I have not experienced. Been a great car so far at 29K.
Oh, my dad had a 1994 Grand Marquis. On the highway it did no better than 25 MPG, so clearly I can't see how that gets better mileage than a V6 Accord.