If you don't plan on using the 5.8GHz internal reciever you shouldn't buy those. The BASE
version is less expensive.
However, why can't you use the HP? Wired, do you mean power supply or video? If it's power you can solve that by using an extra battery to power the goggles. If it's video then it's no different from the Fatsharks, you will still need to use an external 900MHz VRx and have a video wire between the VRx and the goggles. In any case I wouldn't buy the other goggles, I would keep the HP.