Phal equestris is nice. They are almost always blooming, and make huge amounts of keikis. They do well in intermediate temps.
Psychopsis are almost always in bloom, or so I've read around here! But not sure on the conditions it needs.
I agree with Camille. I bought a Phal equestris var. alba last March and now it's growing new roots+leaf and a spike! They're crazy little guys that packs a punch.