I have two sensors on my front end, so far it's been bullet proof to any gun no matter where it's aimed be it CM/RHL/PHL or even my E-Tag.. I was going to add a third just because I could but really it would just be a waste of money..
When antilaser produced the ALP with possibility for three heads at the front I am sure they had much larger vehicles in mind, than just a regular passenger car.
I'd out the extra money towards either a Bluetooth module or R/G module and STI-R+ head.