I just played this the other day
though I played it through the Wii Virtual Console, I still actually have my SNES (model 2, too!) hooked up right beside the Wii (I was simply too lazy to go find the cart itself)
also, a year or two ago, in a goodwill store, I found a copy of it for $2. that was virtually a steal
I used to pick Koopa Troopa, who I think is Toad's equivalent? he had great handling
now I pick DK Jr. or Bowser because they seem to have the highest top speeds, and getting used to their controls is not horrible
the only thing I struggle with is the timing at the beginning of the race - you know, to get the super boost. I need to practice that a little more
excellent game though; I love the ghost tracks the best