The ones which get a bit 'vociferous' under WOT, but are reasonable/un-objectionable under light/part throttle, with minimal to no drone, are the CP-E Nexus (minimal drone), and Thermal R&D (NO drone, as per most of the owners on here). (These are both 3" diameter systems.)
The ones which are a bit more toned down at WOT, and almost factory-like at idle/part throttle/steady cruising speeds are the FSWerks, Cobb, Borla (and the Ford Racing made by Borla), and Mountune. (ALL ~2.25" to 2.5" diameter systems)
I don't know enough about the Greddy, Injen, Miltek, etc. to either suggest them, or comment on them, one way or another, except for
one mixed review of the Greddy, with a complaint about drone.
Most on here who have bought the MBRP could not take it for very long due to the pounding drone (but a few love it, despite that headache), and have swapped out for something more 'civilized', and less migraine inducing/deafening.