For a four door car, Ford really needs to do what GM did and start importing the hot rods from Australia. The Ford Falcon (FPV) would perfectly counter the Chevy SS (Pontiac G8) and give them a true performance 4 door car. The Taurus SHO is awesome for what it is but, it's not even close to competitive with anything like the Caddy CTS-V.
As for a fast SUV, the only thing Ford has built that's even close is the FLex Ecoboost. They really don't have any platforms that are similar to the Jeep SRT8 or the former TBSS.
99 Chevrolet Camaro Z28 M6 - 6.676 @ 103 in 1/8, 10.512 @ 130.2 on street tires, H/C/I
93 Eagle Talon TSI AWD 5spd - Built 6 Bolt, 16G Evo3, HKS 272 Cams - under construction