What do competitive-to-semi-competitive Tau lists look like these days? I've dug my old models out of the box in my room and I'm curious as to how much I'd need to spend to bring them to modern standards.

I've got about forty fire warriors, a bunch of pathfinders, and a box of kroot, plus nine suits (three plasma gun, three missile pod, two blaster and a flamer) and two commanders. (Plus a pair of skyrays/hammerheads somewhere.)

Tau don't seem to have much that can deal with Knights, other than spamming fusion guns. I know I'll need a riptide and some broadsides for starters, but will I need two more riptides and six more suits before I'm playing in the big leagues?