Personally, I like the Mando one the best, but maybe that's just because I like Mandos.
Another F4 squad that I've heard discussed is this:
88 Darth Revan
49 Sith Heavy Assault Droid
49 Sith Heavy Assault Droid
14 Iktotchi Tech Specialist
200pts
That's a lot of +14 attacks, from droids that take a LONG time to kill.
And one I've wanted to use for a while:
115 GMLS
45 Mara Jade, Jedi
29 Ganner Rhysode
11 Human Bodyguard
200pts
I just love using GMLS, and with Ganner and Mara he's got a chance to do really well. Your opponent has to choose which major threat to try to take down first, which allows the other to wreak havoc quite freely. Make sure that Mara and Luke enter combat on the same round (usually move her 6 squares for an assault and levitate Luke in for his 6-hit combo), or else the one will die before the other can get there to divert your opponent's firepower.