Supra Turbo28? I have an A2000 config'ed with one and really like it.
That's the one.

Got a sweet deal on one a year or so back on ebay, think I paid $35. Works out to a little over $1 per MHz, wohoo, speed demon!

Also, +1 on the bad floppies! I've had to do the same thing (burn multiple copies of a disk and swap as each one hit bad blocks). I've got a box with hundreds of disks in it, but dread each time I need to dip into it, so many have failed recently.
