The STI is a great daily driver: fast, comfortable, good visibility and the hatch makes it practical. Handling is good with some understeer but the AWD grip is amazing. The interior quality is a little sub-par but it is an Impreza after all. Road noise is a bit on the high side but much quieter than the previous generation. What's missing are heated mirrors and headlight washers, heated seats and the push button start system.
The AWD, hatchback practicality, Turbo
A few more comfort and convenience features, twin scroll turbocharger, Recaro seats. Oh, the Spec C would be a nice addition the the line up.