This is really a personal preference thing - any of those could be a good match for your setup.
I have had several pairs of Ions, really like them. If money is at all an issue then I'd say go with rulers, which was my first boot, I prefer the stiffer Ion, but at half the price it's hard to say the ion is worth double, especially if you're still learning.
My view is that boots wear out after 40-50 days so keep that in mind, if you're on the hill a lot you'll be buying another pair each season. Others keep their boots longer, again it's a preference thing.