Dedicated arrows is fine, but not enough.
There are 8 navigation keys that you need all the time if you are proficient with a keyboard:
- up
- down
- right
- left
- home
- end
- page up
- page down
I know that the common answer is to have Fn+arrows do home/end/pgup/pgdn, but from experience with an Apple aluminum keyboard, it sucks. It messes with chording on the left hand, which has to deal with Ctrl (jump over words) and Shift (select text). And on a standard keyboard there is no room for an Fn key on the left side of the keyboard. So you will need to break the left side also.
The solution is a right-handed Fn key that you press whenever you want to do any of the 8 navigation actions. The Fn key is pressed with the thumb while the other fingers of the same hand press a navigation key located in the same area. The location of the keys must be chosen so the right hand is not constantly stressed.
The left hand does what it does when using a standard (full) keyboard.
If you are willing to experiment with this, you soon realize that a standard 60% keyboard already has all the keys you need. No need to break anything.