have two...simpson voyager that is set up for daylight with a blue smoke shield....impact charger set up for night time with the amber shield. both helmets have advantages and disadvantages. the voyager has a wide view window and it's high up so i have to block about half the shield to keep the sun from shining right in my eyes....the charger has the bottom lip that makes it push up when wearing the valhalla 360 device.....but i wouldn't trade either one....both are fine examples of good engineering and safety. some will disagree, but you need a helmet that's appropriate for your situation and budget. i'd love to have a stilo...but the least expensive one is $900.00 and most racers don't have that kind of capital laying around. so, what's the answer? reasearch all of them yourself. be conscience of price, construction and what the helmet is rated for (karting, auto racing, motocross....) and what your budget can afford. A lot of "M" rated helmets will do just fine for kart racing. While "how much is your noggin worth?" holds true for a lot of safety equipment that we buy, we are all budget minded racers and buying a $1000 helmet just isn't in the cards. Some will say buy ---------- (name your own brand) because ------- (fill in your reasons), but the bottom line is what can you afford that will protect you in a way that will let you race and still be safe. Spending $1000 on a helmet, or even $500 is a lot.....but there are more affordable ways to give you a level of protection that all kart racers need without breaking the bank. I do know some racers that spent $1000 on a helmet, jsut to stay at home from racing because they couldn't afford it. Doesn't do you any good to have a very expensive name brand helmet to protect your noodle when you can't afford to race.....