I have 6 metal Striking Scorpions that need to be stripped and re-painted (moar eBay fix-er-ups). This will be good motivation. I have some Harlequins and thought about them instead of Scorpions, but the models are 'fine' cast and 5 v 5 I think Scorpions would win. Still, I have no ranged and the Shrieker Cannon would have been interesting. I also considered Jet Bikes and a Vyper, but I'll leave it to my Saim Hann bretheren to make that happen.
[Edited in light of new Kill Team rules.]
5 Dire Avengers, Exarch 75
--Exarch (Guerilla Specialist): Preferred Enemy (Everything)
--Dire Avenger, 'Deadeye' (Weapon Specialist): Ignores Cover
5 Striking Scorpions, Exarch (Scorpion's Claw) 125
--Exarch (Combat Specialist): Rage
The Dire Avenger Exarch is my Leader