If you're planning to turbocharge down the line, don't bother with a brand new unit. Sayang warranty. Go for a slightly used secondhand. Probably best turbo project within a reasonable budget would be a secondhand Lancer GLX 2.0 MT (MT ha... not the CVT... not if you're going turbo).
Amongst your brand new choices, I would not turbo the Swift 1.4... I don't know if the engine can handle it. The old 1.5 was already marginal for a turbo project. An outgoing Fiesta 1.4 might be okay, but I'm not sure. The Fiesta's 1.6 can definitely handle boost, but the dual-clutch definitely can't. It is not rated for high torque. The Mazda2 engines have fragile plastic manifolds, but some guys have successfully done low-boost builds. (your limiting factor would be the clutch)
The Accent CRDi MT... ayun. Turbo na. Just need a chip, an intercooler and some exhaust work to make it more fun. Then you can work on the suspension and brakes to bring it up to par in terms of handling with the Fiesta and Mazda2. Then there's the new Kappa 1.4, which might be able to take some boosting compared to the higher spec 1.4s.
The Rio, I wouldn't do the 1.4. The 1.2 might be interesting to boost, but you won't make much power...
Still... if turbo is where you want to go, best bet is to get a secondhand Lancer 2.0 (MT! Basta MT!) or a secondhand Civic 2.0. With the Civic, even the automatic can take a little boost with no problem, but if you're going for 200 whp or more, you'll want to upgrade it.