I mentioned the Cirrh/Bulbo only because the forum sponsor has a good deal on it right now and it would be an excellent choice for someone who can give it adequate warmth and humidity, such as that for lowland Neps. That makes sense since they come from the same areas. My orchids are almost exclusively species orchids, other than for some hybrid Catts picked up as extras in trades. They live outside in trees for ~4 months here just outside of Hartford, CT and hang in windows or sit under a two bulb fluorescent fixture the rest of the year. Just like my highland Neps.
I choose to grow species orchids for the same reason I choose to grow species CPs. That's because I find it more appealing. Like happens with Sarracenias, there are many natural hybrid orchids. Plus, there's so much variation within species and so much selective breeding, you could probably collect nothing but different varieties of a single species and fill a greenhouse. There are many thousands of orchid species, adapted to all kinds of different environments. So decide what growing conditions you can offer and choose accordingly.
It's easy to fall for flashy blooms and I keep getting seduced. Take me, Laelia crispa, I'm yours! But they always want more than I can offer and, in the end, they go to other growers who offer what I can't. Why, oh why does it always have to end?!? I'm kind of describing my pre-marital life, but this is a plant forum. What I can grow well are things like, for instance, my Encyclia tampenses, Tolumnia tetrapetala, Pleurothallis tribuloides, and other plants who tolerate too much heat some times and too much cold others. They don't mind several straight days of soaking rains or the occasional dry period. They'd rather have more humidity in Winter, but can wait until Spring. The selection process relies on a sort of educated trial & error. Buying that book was a good start.