Don't worry too much about the mushrooms to use. I typically like to change it up each time I make this dish to get a unique flavor everything. So far I have made this at least 8 times and there has never been a combination of mushrooms that did not turn out delicious!
But for those of you who want a recommendation I like to use portable, shiitake and white button mushrooms. If you can get them - oyster mushrooms are a very unique addition to this dish!