www.tirerack.com also has the tires.

According to tirerack, there are two different stock tires.

Bridgestone B381 and Dunlop SP20 FE

Their price is $75 and $57 respectively. You probably want to buy two anyway just to have a matched pair as far as treadwear goes.

Now, they do have tires in this size ranging from $31 to $87. The dealer is charging you a profit margin for the part plus the labor to do it. All shops do this at different amounts. You can always buy the tire and take it somewhere and they will put it on for you at a reasonable cost.

The O.E. tires will have a much lower rolling resistance, and will get better mileage, the same as inflating them to the max you feel safe with, but ... if you get a different tire, you may notice a smoother and quieter ride, the same as having the labeled tire pressure from Honda ... It comes down to what your wants and expectations are