Without a full review (which you're probably getting to) what is the big deal, thus Josh's obsession, with Burning Wheel, Savage Worlds and Spirit of the Century?
Those games actually do the things that people want their games to do. And they do them out of the Box.
The Gumshoe games I find very interesting as well, however they have problems out of the box.
Games like Serenity are crap but rather than just saying that and leaving the issue there, I need to proffer a suggestion about what to play.
So I suggest what I can. There are tons of crap games out there, and there are tons of very specific games that are good. There are very few games that are 1)General Use* 2)Good mechanics 3)Work out of the box.
In fact there are: Burning wheel, Spirit of the century, Savage Worlds, 4e DnD, Mutants and Masterminds, Dread and Saga Edition Star Wars (that list is a practical list, meaning the games I have recommended without reservations)
*by general use I mean fit into the style of the game the poster is talking about