Chrome takes the fewest resources, is more reliable or as reliable as any other browser, and loads everything faster than any browser besides Safari, which is kind of a resource hog and also tends to crash easily, in my experience. It has one problem though-it sends all your surfing info to Google, which is a bit too big brotherey for me.
If you want all the benefits of Chrome without the spyware, try srware iron. It basically identical to Chrome, minus the different themes, I think.