[Eastwood]

Cool set-up, man. You've pretty much got the exact car that I want: hatchback STi. Pictures anywhere?

I'm sure this has already occurred to you and I don't know your driving routes situation, but maybe look at trying to find an alternate route that might be a little longer but has more flow to it than your current 6 mile commute. Coasting as much as possible without being a road hazard will be your friend.

Also, look into getting an engine warmer and/or oil pan heater to help your car get a leg-up on warming up before a short drive. I imagine any aero mods/blocks you might be willing to consider, a la jedi_sol's 2013 STi, might help keep heat in and provide for a quicker heat-up too. I'm thinking specifically of those grill blocks or any variations on them.

And keep asking around here. Lots of very knowledgeable and creative people are here to help.