Then there's also the question that how much you're actually going to be needing the arrow keys? Personally I would rather take ä and ö over the two arrows any day since I don't see myself using the arrows that much with touch screen device.

So probably best way to decide this would be taking a deep breath and thinking about how you're going to be using the phone. If there really is important use for arrow keys and remapping seems too much hassle for you, then you probably would be better off with some other device (or buying one with other keyboard layout?).

Anyway it might be interesting to hear from people who have used this device how much use there really is for those.