I'll be glad to take that "inferior" Apple TV off your hands if you ever want to sell it.
My 500X2 is the least reliable piece of hardware I've ever owned. It crashes every day I use it.
I suggest to make some post in the Tech section of the board:http://www.mede8erforum.com/index.php/board,51.0.html
And post what kind of problems you have so we can try to find out what the base is of your problems.
It should be stable, so what you describe is not normal and it should be possible to solve it.