polarizer filter or UV filter?

[Justintoxicated]

I just bought the e520 with the reg kit lense and I want to get some filters for it. I was thinking to get the polarizer to help with glare when photographing fish tanks. Should I still get a UV filter as well? If so what type/brand is recommended?

Also any case recommendations for this camera?

Need to get stuff ordered and shiped before I leave on vacation.

Should I just get something like this or will these cheap filters ruin the pictures?
http://www.amazon.com/Olympus-EVOLT-...5459029&sr=8-1

or would I be better off buying jsut teh Polarizer filter like this one?
http://www.amazon.com/review/product...owViewpoints=1

I don't know how much quality I would want/need or if there is even much of a difference in filters?

I'm leaning towards this one unless teh Cheaper Hoya filters are not good?
http://www.amazon.com/Hoya-Digital-C...outThisProduct