I still prefer the 8x8, to be honest. Unless you get an 8x16 font that is made for it, fixed-width 8x16 can look pretty ugly. However, most 8x8 fonts from the NES/SNES age were built to be fixed-width (as not many people had been crazy enough to do 8x8 VWF at that point), and look quite nice.
Plus, you can fit twice as much text on the screen if you need to (and given that it's an RPG, you might).
~DS