I have the Motive 4:10 gears in my car, have had them about 3 months or so, so far I love them, No gear whine from them yet, (knock on wood, as I heard this was a problem with 8.8)
I have heard nothing but bad things abotu Motive. Personally i know nothing about them except that when i was pricing my gear install. Nobody would install a Motive gear around here.
find some FRPP...you can get them off ebay brand new for cheaper too, i LOVE mine they kick ass and you will also need to get an install kit too...hope this helps
Personally, I'd go with the 3.73 with your Bullitt, but I'd only do the FRPP gears. Motive has had some success, but for $10 more you could get the proven gears from Ford Racing.
If you still end up getting Motive gears, you'll have no problems though. They're just as tested and effective.