I'd stick with the Software Mods until the hardware one yield higher returns. Alot of people are already reachin 700+ without even the software mod, and none of that voide the warranty. So for the effort and potential pain, I'd recommend sticking to the software side for now.
However anyone trying to go full on over the top, the 800+mhz range might need someting like this.
Nice Find though, always good to know your options.