I'm not sure there is a polarizer that will avoid vignetting if you're shooting near the 10mm setting. Most of the thin ones will be OK from 14mm on. For ND filters, I use Cokin's. I have their various filter holders for different size lenses, but I rarely use them. Normally, I just hold the filter in front of the glass unless I'm shooting a long exposure with a tripod and then you rarely need an ND filter (flowing water can be an exception). Here's a link to Cokin's site and most camera dealers sell them. http://www.cokin.com/ico6-PO.html
I rarely use any filter other than a polarizer, ND, GND or a star filter. Many filters can be reproduced and manipulated better in Photoshop. I do use UV filters on my lenses for protection although many argue they are not necessary. I normally try to stick with the major brands - B & W or Hoya. I have tried Canon's and Tiffens filters too, but don't recommend them. I seem to get much more flare and reflections with theirs than I do with the other brands.
Congrats on the new lens. Looking forward to seeing some pics taken with it.