My wife and I cook with olive oil quite often, polishing off 4-5 liters each year. Of course, there's a difference between "cooking" olive oil (usually just "virgin," but we've used "extra virgin" to cook, as well) and "fancy" olive oil (the premium "extra virgin" stuff). We've tried lots of different brands and haven't really settled on favorites, so I'm wondering, what brands of olive oil ("cooking" and/or "fancy") do you swear by?