I am partial to creams , like MAC strobe and Jouer cream highlighter. that being said... i really like the Hourglass Aimbirnt Lighting powders. While not technically a highlighter,They give the skin a beautiful glow.For eyes: Le Métier de Beaute makes a beautiful brighter- called refresh
This is a great recent video from EmilyNoel83 on YouTube all about dupes for high end highlighters.
I watched the video and went out and got the Wet N Wild "bronzer" that she recommended as a highlighter. I was so happy to find it on sale for $3 and it's a nice big compact. But it went on like white or off white powder on me. I can't see any shimmer at all. I was wearing makeup and had Armani fluid sheer on. Maybe if you put this on with just your foundation you'd see it. I went to Makeup Alley and a lot of people there seem to like it. I'll play with it some more but initial reaction was disappointment.