Light pollution filters

What's the current thought on these? Are there any out there that are
worth the money?

I already have an Astronomik UHC filter which is pretty good, but I'm
wondering if a more general pupose filter might be better for casual
deep sky stuff from a fairly badly light-polluted location (Stafford,
UK).

Jim
--
"Well, well. We've come a long way from the Prime Minister's
exploding cake." - Adam West, Batman.

http://www.UrsaMinorBeta.co.uk http://twitter.com/GreyAreaUK