So you want a semi-permanent pole or totally removable. Do you want stainess steel? Brass? Powder coated? Do you have grip issues? These are all things to consider.
The lil mynx poles are easy to install, but they only come in stainless steel (very slippery) or powder coated (very grippy but the coating can be scratched off.) If you can screw a mount into your ceiling, I'd go with lil mynx to start. If you have no grip problems, then get a stainless, but if you are a sweater, then get a powder coated one. You can always get different poles later once you improve.
Right now, x pole seems to be working out the kinks with their new x joints. I have had some troubles with my x pole. Don't get me wrong, I love my x pole. I have a titanium one, and the grip is gret, but I still worry that the joint will rotate, stripping the inside of the pole, and ruining the inside of my pole, etc. It's a headache. Go look at past thread on the topics of lil mynx and x pole.