Recommendations for smallish indoor Cat/Stan/etc, please

[nogreenthumbs]

I live in an apartment with no outdoor space. I'd like to get something to grow in an east facing window that gets unobstructed light until noon. I live in Houston Texas which is hot. That means that between May and Oct, the A/C will probably be running 24x7 keeping the place in the 71-75° range. The east side and north side of the apt has a lot of windows and gets a lot of light. There are no south or west facing light sources at all.

I currently have 7 other orchids which include a couple of phals, a couple oncidiums, a cattleya, prosthecia and a grammatocymbidium (that I found out later may end up too big).

I'd like to grow a member of the Catasetinae family. I like the whacky looking bald pbulbs when they are dormant, and the plants and blooms when they aren't, and the yearly life cycle is fascinating to me.

Can you give any recommendations of any specific hybrids or species that would do well in a fairly temperate environment that I will work to keep humid, but will probably not be super humid. I can water daily if I need to.

I guess the main things is that it needs to not get too big. Maybe 2' - 2.5' is a max?

Thanks