My proposition is add icons (mashup in attachment). Each icon is HTML checkbox (stylled smart). Each icon should be stylled to "button like" with two grafics pushed in and pushed up. But I'm not sure how implementation of "remembering" should be made.
I have another idea. I still don't see how searching in RB works but :) this filtering could work like views in MySQL or something. You build advance search result query and get results. This search could be saved as link in Dashboard panel to further use. This allow to create custom views of reviews. Also default views (current) could be pre-installed search queries :) What do You think?