You don't need filters for PST imaging. I only have the filters for Jupiter, Saturn and deepsky stuff with my ATiK 16IC. If you are imaging in Ha then you can forget about any other colour. In fact colour cameras can create more problems than they solve. You are only imaging in a very narrow red band, but unfortunately some cameras (SAC 4.2 for example) end up with better exposure in the green channel than the red. (See pdf link below for explanation). You can successfully solar image using colour cameras like the 300D or a DSI or a ToUcam, but you will not get the same quality of image as using a Mono camera and then creating a false colour image. Infact you will have to create a false colour image anyway using a colour.
The best thing you could do is have a look at this site
http://www.astro-nut.com/ in the Solar images section and also at the bottom of the page for the
Solar Imaging Primer. This Primer sorted out a lot of issues I had and made life very much easier for me.