Hey thanks buddy, it's a VFM car interesting speaker setup u have there any suggestions as I need to get something in as well.
As for the speakers - its difficult to suggest man. I would advise go according to your budget. There's no end to speaker/audio selection. Focal/Hertz/Infiniti are good brands for components ( yes you need them atleast on the front side ). First time I tried Cerwin Vega - and it sounded perfect to my ears- in short very satisfied. I was about to buy Diamond Audio speakers but skipped that due to huge price difference.
For subwoofer - I will ALWAYS suggest JL audio - but hard to get an original one , even if you get it not sure about the warranty stuffs. So you can go for Rockford,Hertz etc. Try to audition them - thats more important. I like tight bass and not boomy trunk rattling one. So you see it differs a lot from person to person. My Cerwin Vega 12 inch sub is just what I wanted. Clean-tight bass that never gets distorted. And yeah, no rattle ( may be good design by Ford .
As far as HUs. I am still looking for a double din one. Then I will sell my stock HU and speakers. I would advise to go for double din which will cover the entire area. I never liked single din on a double din slot. It kills the factory look no matter how costly the single din receiver is. Just my opinion.