I always have razor burn from it too. I always have used a man's razor. Gillette sensor. I decided to buy one of those venus things and it is a piece of crap! Sorry, it just doesn't work nearly as well as my old razor does.
The intuition razors also suck.
You can try bikini zone. You will find it at wal-mart with the nair and wax products. You just put it on after you shave and it does help a little. I also read on another post here that if you get "hair cholesterol" and put it on after shaving for like 15 minutes and then wash it off that is suppose to help a lot. You can buy it at a sally's beauty supply or with the products for coarse hair. I haven't looked hard enough to find it yet.
those dang things they advertise on t.V, what is it called, oh darn, you know what I mean that little hair removal thing???? They sell it in the stores now, but I can't remember the name. My friend bought it and said it isn't worth crap, so don't waste your money there. If I think of anything else, I will let you know.