Being a drummer, I can tell you a drum stool (aka drum throne) is not a good solution to this issue. They are designed in such a way that if you use them for a long period of time without a lot of body movement, your butt will go numb and can cause some minor back aches. the "motorcycle" style seats are even worse for this.
There are some thrones that prevent this problem, but they're in the $120 and up range.
I just use a normal padded chair that has a "cup" to the seat. Never had a problem with it.
-Harry