I'm thinking you should just get the 5-speed manual. I've heard that the shift/clutch feel is fantastic, and the trans is the proven MTX-75. It'll save you ~$1000 upfront (unless you get the Titanium), which is a lot of gas money that the Powershift would have to make up.
Mine: 2002 Focus SVT: 142k, Sonic Blue, #1654, All Options
Mods: Tom's Tune, Borla, HFC, STS, Painted Machs, Euro Grill, FRPP Springs
Hers: 2010 Focus SES: 67k, Ebony, Auto, Moon and Tune