I've no experience with any of the brands you're looking at so cannot say anything regarding the quality of the shadows, not to mention I'm personally not a massive fan of premade palettes in general (though I do own a couple of palettes that I really love). I prefer to buy singles and make my own palettes. That said, you may want to check out Urban Decay's Electric palette, too. Very bright colours. (Both the premade palettes I own are UD, and I really like the quality of their eyeshadows.) Sleek's Acid palette has some brights in it (if you're in the States, you cannot order it from them as they won't ship it here, but there are other ways to get it). For single eyeshadows, Inglot has a huge variety of colours.