I agree with tropicbreeze and njoasis, my vote is for lady palms (Rhapis sp.) or chams. Both are great indoor palms for low light conditions and can also take bright light indoors. Rhapis are one of my favorites and can be tough to find depending on your area, solitary chams might also be hard to find, there are many species and many are suckering. Rhapis sucker too but are very elegant and the trunks are visible. Forget yuccas, they need full sun period, though cordylines might work. A tree fern might be a good option too. Regarding the list you proposed, the only one i think would be suitable for the conditions would be a sago. The others would suffer severely from lack of light, your light conditions don't sound ideal. A western exposure will get very little sunlight in the winter, especially if you don't have it directly in front of the window. A sago can take low light and will be exceptionally slow in those conditions so buy big, but they can pinch you if you bump into it. Kentias would work too, but I think they would be much to big for a bathroom.

Les really has the right idea here. It is very much dependent on the mirror and lighting. Here is a case study for an old MS color called Honeydew, a vibrant saturated yellowy green. I used this in my powder room in my summer house back in 2002. No windows, tiny bathroom, big mirror, plenty of Reveal light from a typical three-light over-the-sink fixture. Honestly, my skin looked really great in that bathroom, absolutely contrary to what one would expect. My daughter, who has different coloring, also loved the way she looked in there...enough to request that color for her current bathroom. Flash forward to last year, another gallon mixed and up on the walls in her bathroom. She has a pitched ceiling and I painted it all with the green. The mirror is a tiny little Pottery Barn thing and the lights are the adorable little sconces from Rejuvenation. She has a huge skylight and overhead lighting as well. The color just doesn't work from the standpoint of good facial color rendering and makeup application. But, she doesn't care. I have asked if I can at least repaint the ceiling, but she likes it, so I am on to the next room! In my current and previous bathrooms, I have used MS Atlantic, a blue green "spa" color. In theory, this would not be a good color for the reflectivity problem, but it has been incredibly popular for the last decade or so. In my last bathroom, I had a large tiled wall of green Silestone and had no issues with reflection back onto my face. The first wall color...yes, it went minty...but my skin did not. I think that there is no one-size-fits-all answer for this conundrum. But, more light, better light and less wall is a good guideline for preventing the problem.

Could it be Trachelium caeruleum? It is difficult to tell from a photo, but have a look at this. Daisy Here is a link that might be useful: http://www.google.gr/search?q=trachelium+caeruleum&hl=el&rlz=1C1PRFB_enGR479GR479&prmd=imvns&tbm=isch&tbo=u&source=univ&sa=X&ei=tpuSULmMKqXG0QWb7IGwDA&ved=0CB8QsAQ&biw=1241&bih=606

Very few palms are tolerant of water-logged conditions (though there are a few..., Cat palms and Majesty among them), but Trachys, like most palms need excellent drainage. Also, keep in mind, Trachys do NOT grow best in very hot weather, being temperate to subtropical zone palms, they grow better when highs are under 90 (unlike Sabals that are real heat lovers), so this may be another reason you are not seeing decent growth, and if there are structures near it (your house, garage, etc...), those temperaures you hear being officially quoted my be much COOLER than what your palm is actually experiencing (reflected heat). Finally, have you been feeding (palms are relatively high feeders). P.S., If you want to expand your palm collection, I strongly suggest you consider Sabals, many are heat and cold tolerate to Zone 7. Sabal minors are among the most cold tolerant of palms. I also like Sabal 'Louisianna' as it is faster growing (but a bit less hardy then S. minor). Sabal bermudana (Bermuda Sabal) is probably my favorite Sabal but probably only hardy to Zone 8.