so right now definitely between an impreza ('13) and a legacy ('10)
That is a huge range, the base models vary significantly vers the higher trim.
Personal opinion but I think the 2003-2009 Legacy models are MUCH nicer then the two you have listed. A guy in my neighborhood has a mildly built 09 GT and its badass.
The newer Legacy models are huge. I like the older and smaller versions.
His is something like this only dark steel grey with STI Brembos.