I would go with the Vorshlag setup. They trimmed the dust shield down a little, but left a bit to guard the ball joint. I have only owned the Vorshlag dust shield/duct mount so I don't know this next part first hand, but apparently the FRPP kit you listed is a PITA to fit a 3" hose to. Vorshlag addresses this fitment issue with their kit. I know mine was easy to work with.
I was recently reading about Vorshlag wanting to straighten out their ducting with less kinks and bends for better flow. You might want to ask them about that if you got the Vorshlag route.
Right now, with the Roush fascia, I am noticing a pretty blatant bend in the passenger side ducting right at the fascia where the tube meets the inlet. My AC condenser piping/tubing is right there....and it's metal. I need to find a fix for that. I wonder if there is a way to use a different fitting and a flexible line?