You thought your sport edition's seats sucked......try sitting in the SR5's seats for about 2-3 hours. They are just like a Chevy's--"Like a friggin' hard ROCK!"
I thought the seats were confortable in my SE but that may be because I have a low back injury and he lumbar support is very helpful. I have driven for 6 hours straight in them with no complaints...just goes to show you that not a one size fits all.