What’s the best way to implement an interface that looks like this in rails?

Currently I’m using Searchlogic, and it’s a tad painful. Problems include:
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Making sure certain operations remain orthogonal — for example, if you select “Short Posts” and then search, your search results should be restricted to short posts.
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Making sure the correct link gets the “selected” class. Right now the links are
<a>‘s, so maintaining this state client-side is tricky. I’m hacking it by having the AJAX response to, say, sorting return a new sort links section with the correct link “selected”. Using radio buttons instead of<a>tags would make it easier to maintain state client-side — maybe I should do that?
I recently solved a similar problem using named_scopes and some ruby metaprogramming that I rolled up into a plugin called find_by_filter.