If you like to see sidewall, that would be a good choice. If that's what you want to do, getting your speedometer recalibrated is no big deal. It cost me $80 and the guy caught an issue with my odometer as well.
Another thing to think about is how far you are putting it out. Discount Tire's website (I think) still has a calculator that tells you how far out you are going to be based on the original tire size and the one you are going to.
For about the first year I changed to my 15s, I just carried the chart around for when I got into higher speeds where it deviated more than 5 mph from where it was supposed to be.
The important thing is to get what you want.