Problems with query_posts()

Okay, so this problem has been bothering me for a while, basically I need to write a VERY complex query for wordpress.

Here’s an example of what I’m trying to do.

Post 1 has a title “My mac computer is shiny”
Post 2 has a title “My windows computer is really slow”
Post 3 has a title “My linux computer is shiny”

Now, I’m writing a keyword filter. I have the following keywords that can be toggled:

Mac
Windows
Linux
Shiny
Slow

Now, basically when you check the box it’ll look through the title of the posts and pull posts containing the keywords. This all works perfect, but I need to find a way to do multiples… okay, no problem right? Just use ‘relation’ => ‘OR’ for the meta_query.

WRONG. Because I also have options above for combining the keyword filter with a category filter. So if I use ‘relation’ => ‘OR’ It’ll display if it has EITHER the category or the keyword. I need it to display ONLY if it’s in the selected category and contains the keywords.

Any way to do this?

[No bumping. If it’s that urgent, consider hiring someone.]