UV filters and polarizers, are the all about the same?

[masp]

Who makes the best UV and polarizing filters? Are they all about the same? I'm looking at the cheap UV and polarizing filters at B&H for about $50. Adorama also has a kit where a Tiffen filter is only about an extra $8. Just looking for a quick and good way to get started if you have any suggestions.

This Hoya filter set looks like a fairly good deal, a 3 stop ND filter, a +1.3 stop polarizer which were mentioned on the podcast, as well as a multi-coated UV filter. Multi-coated is good right? I'm not sure if the ND filter and polarizer are worth it though. Maybe they're too low end to really be useful?

Also some kits include a warming filter, but I guess this is pointless if you can just adjust white balance in camera right?