I recently purchased the Orion SkyQuest XT8 and I love it. I want to expand on my accessories, but I'm not sure what to get. I enjoy looking at (in order): galaxies (although I have yet to see one even though I've tried, but galaxies fascinate me the most), planets, nebulas, and the moon. I have the 10mm and 25mm eyepieces which came with the telescope, but from what I've read, I need a low magnification eye piece for galaxies, a high magnification eye piece for the planets and filters for the moon and nebulas. Is this right and if so, what types or brands, etc should I get of each?