Most low light orchids do well up there. I had luck with Phalaenopsis and
Dendrobiums. I would expect Paphiopedilums to do well also. You could try
Cattleya if you have good sun exposure; we used to have some in our
university greenhouse in upstate

For better info. I believe there is an orchid newsgroup something like
rec.orchids. Look them up. They can be very helpful.