The margin settings on the Kindle are only poor in that they could maybe do away with the widest margin setting and give another option for smaller margins instead. I can't imagine anyone would use the largest setting, it just looks so bizarre?
That apart, I use the small margin setting and am perfectly happy with it. The ability to add custom fonts would be a nice addition, even though I'd probably not bother using it.
The screen on the Voyage does look nice.... my PW2 is just fine though, unless it meets with an 'accident' I'll be resisting the temptation!