A filter wheel is matched to the camera, not to the telescope, although you will need some adapter to attach the wheel to the scope and to the camera. So, first you select the camera that you want. The size of the chip in the camera determines the size of the filters that you need. Normally, people get LRGB filters at first and then they may get narrow band filters at a later date. Given that you have a 290 any wheel will do for that camera. Just pay attention to what adapters you might need.
If you are doing long exposure astro-photography then you will almost certainly need an off axis guider with that telescope and the focal reducer. If you are just going to do short exposures of the moon and the planets then you have a much simpler system.