If you go with one of the more affordable 2012 Kia Forte models, you won't miss out on much--except for maybe telescopic steering adjustment, which comes only on EX models and above.
Air conditioning remains optional on the base Forte LX, but all Forte trims get Bluetooth, Sirius Satellite Radio, and an auxiliary input jack for the audio system, plus steering wheel controls and voice activation. The EX model adds A/C and power accessories—and larger 16-inch alloys, for Koup models—while the SX adds fog lamps, plus upgraded upholstery and trim. A sport-tuned suspension, larger brakes, and showy 17-inch alloy wheels are also part of the SX package.
Forte Koup models are spiced up just a bit in features and appearance versus Sedans of the same level; for instance, Koup EX models include 16-inch alloys, instead of the 15-inch steel wheels of their Forte EX sedan counterparts.
A Technology Package brings navigation, Sirius XMTraffic, automatic climate control, and push-button start, plus other upgrades, while other options are limited to a power sunroof, leather seat packages (heated in front), and a Convenience Package that adds A/C and other upgrades to the LX.