Bride + low mount rail = epic win.
I look like a little kid sitting in my car with a Bride Brix (recliner) and superlow rail in there, but theres so much head room even with a helmet on. Also, being a drift orientated seat, they are designed to hold you in place during crazy transitions, nothing short of rolling the car will see you move in the seat (my leg didn't even hit the trans tunnel when I crashed, and I was doing at least 50 kays backwards when I hit )
Only bad thing about my Bride is it's a right pain in the arse to get in and out of, the side bolsters are so goddam high