I love nabbing Golden when they go on sale (they are pricey, though. I either get them through dickblick.com or if there's a really good sale at the art store) but I'm also not a fan of liquitex. They have such a strange body to them. Too loose but not loose enough, youknow? Not enough pigment, too, it just feels like it's all binder so I have to use so much paint to coat. Golden, however, feels so buttery and has so much pigment that I feel like I don't have to use as much. A tube lasts me a good long time.
What do you mean by making your paint last longer? Do you mean drying time? I used to live in a dry climate, and to keep my acrylics from drying out I'd use a wet palate. Now I'm in a more humid climate I don't need it anymore, but this thing was a lifesaver for me.
https://www.dickblick.com/products/masterson-sta-wet-premier-palette/