The leather steering wheel and shifter were a package with the steering wheel stereo controls on my '04.
I went with the SR5 mainly because at the time I bought, the 05s where due in a month, and there were no 04 Sports available with a V8.
That being said, the only thing that I really wanted out of the sport was the darker interior, and the telescoping steering column. I still wish I had the column, sometimes I feel like the reach to the wheel is just a little too far. It's not enough to make me unhappy with my SR5 though!
--Mike