The WAAS system seems to have worked good the last couple years. I expect it will continue to work pretty well for the next couple years also. Darned sunspot cycle will start to come up after that and raise havoc with the ionosphere. I expect accuracy to suffer as the numbers increase.

I'm looking for something better, but since this is electronics and electronics always get cheaper with time, I'm not going to spend a lot of extra money today, to address something that's 2 or more years away.

I'm hoping there will be something that uses both our GPS birds and the Russian GLONASS birds by then. EU Galileo birds would be nice too, if they have those online by then. Sure would hate to spend a lot extra today that won't have those capabilities by the time we really, really need them