What exactly is the UV filter doing for your camera? Just kind of curious. You do know that purchasing something like a UV filter is only just for protecting the front element these days as your lens/camera already would have items that block off harmful uv rays from affecting the image.
A CPL and maybe an ND filter would probably be a better bet to purchase, and more over ND if you can get them in different stops (or a variable ND filter), otherwise you could stack the CPL and ND filter for an additional stop.
But just saying... If they have an ND I would go ND... Otherwise well do the CPL as it's only $10. If you don't like it, it's not a huge burden removed out of wallet.