I just finished a loooong search for a new pair of boots and my head is overflowing with now unneeded boot knowledge. I would be happy to upload it to you.
If protection is your highest priority then how about a pair of light motocross boots. Here are 3 worthwhile candidates:
Forma Terrain TX HPS
If you want a bit less protection, with a bit more walking ability, then I would suggest looking at these:
Gaerne G-MidlandIf you want the best of both worlds and have a LOT of money to spend, then the Alpinestars Toucan appear to be an awesome boot.
My wife has the Gaerne Balance Oiled and they are very comfortable and they look good (in my opinion). However, I wanted something with a bit more protection (just personal preference) so I investigated the boots listed above.
If you want more info on any of the boots in my second section, feel free to ask. That is the category that I settled on because we do a lot of hiking in the woods after we get off our bikes and I needed some walking ability. (Although I hate having to give up protection, that was the compromise that I made since I could not afford the Toucans).