I use a double filter on my CCD. The first being a particulate filter that is white and liike like spun fiberglass (it isn't though) and the main filter is solid block carbon (SBC).
If you're running just one filter, I would go with the SBC and add an in'line screen to the end of your hose fitting. It should work well, and you should notice a definite improvement in the taste and quality of your water.
I like my filtered water better than the bottled stuff you buy in the grocery, which uses a very similar process and is labeled 'spring water'.
