3" replacement:
I chose the FaitalPro 3FE22 3". There are certainly a number of other contenders (Peerless, Fountek, Dayton Audio, etc) that will fit, have high sensitivity and low power requirements. The 3FE22 improves midrange clarity, dynamics. The stock mounting bolts are 4" apart, which is wider than most 3" speaker bolt-to-bolt distance. To mount the 3FE22, I used one of the mounting bolts and used short, stainless screws in two of the other mounting tabs because there is door panel plastic (and gap) behind the midrange metallic grille. I soldered the wires off the stock 3" onto the new one (I believe black is ground, green is positive). Mounting depth for the 3" and 6x9" is important--too deep and the door panel won't snap back into place. FYI: The 3FE22 is a paper cone driver but they are not all made equal.
6x9" replacement:
PowerBass OE69C-FD. This is a direct fit replacement kit (includes a pair of speakers with housing, stock harness plug) and also includes a pair of 1" soft dome tweeter (not used). You won't get noticeable deep bass improvement with this upgrade but the mid bass is less colored, fuller, more dynamic and plays louder. This driver has high sensitivity as well. Replacement is easy peasy--simple remove and replace. The mounting screws (4), overall depth, and harness plug are all the same as stock.
OE Series 6"x9" component speaker system for Ford vehicles
www.crutchfield.com
UPDATE (see follow-up post): MUST DO MODIFICATIONS... Due to treble brightness, presumably do to high end peak of the FaitalPro, I switched the stock high-pass capacitor from 6.8mfd to 4.7mfd to up the crossover frequency to around 8.5kHz since the FaitalPro 3" has pretty good high frequency extension. Also added Dayton Audio LPF 5kHz (4 Ohm version) in line to FaitalPro. Also replaced stock fabric dome tweeter to Kicker CS series 3/4" ti tweeter pictured below:
END RESULT: Both can play louder than the units they replace and sound better--you can turn it up to 12-14 and it'll sound good. The sound is definitely less colored than stock, more dynamic and more revealing. SETTINGS: EQ - flat, Stereo (not surround), with fade forward. I still would highly recommend adding a subwoofer--I have my subwoofer providing low bass fill below 75Hz.