I was issued with a pair similar to those you've mentioned and linked too (although they could have been different, since I was with the Australians, after all). They took a fair while to be made to my prescription and I managed to lose them somewhere in the North Pacific ocean. Getting my replacements took about two months, and by then I had already went out and bought a pair of Wiley X frames with prescription lenses. Not only did I get them faster, but they were much more secure (coming with both arms and an elastic strap), aesthetically pleasing and remarkably comfortable. They can be a little pricey, but for the use you get out of them, I personally think it's worth it - but do shop around, you can often find second-hand/wholesale frames and just pay retail for the lenses.
I'd wait to see what they can provide you with, you may like them, but keep in mind there are other options out there if you need/desire them. My brother, who is CF, switched to Wiley X as well - and never went back.
If only a decent set of aviators came with ballistic lenses... One can always dream...