nutz.smith holt's are cheap and loads of people use them
Personally, I love my giro combyn but that's a bit more expensive.
razors-chazi recently got a giro ledge mips and have been really impressed with what i got for my money, its not the cheapest but its not poc level of pricing. it is still a single serious impact helmet but its light, comfy, fits goggles under it well and with the mips system, helps reduce any concussions.
NoahTheGnarlyI currently own the Smith Maze and it is such a great helmet. Its so light you can barely even tell you are wearing a helmet. its a little pricey but it is definitely worth the money. I highly recommend it.
ttelrabsmith maze, giro combyn and poc receptor are all great helmets. just depends which one fits your head best.