The big decisions to make are:
- 5 lines or 4
- What colour scheme will match your boardshorts
That is all.

On a more serious note, they've all got a different feel to them. I've ridden Torches, Fuels, Hadlows and Vegas's and currently ride Torches and an old '05 Fuel. The Vegas's i've ridden didn't work for me... but i haven't tried the '11 yet. You won't get a bad kite out of the ones you've listed; it's just a matter of trying them and seeing which one works for you.
Also, don't forget to include the '11 Hadlow Pro in the list.
In terms of bar setup. There's not much between them, so it all depends on what your used to.
Windrange - personally i prefer 5-liners for the 'oosh!t-drop-to-fifth' safety in the event of squalls or something going wrong, but if your an avid 4-line fan then that crosses two of the kites off the list.