I would say I'm happy with where I'm at with the car. Do I want more... of course, but I'm never going to be the fastest and I'm never going to have the most power so why keep dumping $$$ into it especially since it sits 75% of the year. You say drive it more then... I would, but I teach in a bad area and would never want to risk someone doing something to it. Plus it's around a 100 mile round trip and I get like 14mpg.
Then comes the $ part... 2 routes of finishing up if I did go on: N/A or Power Adder....
N/A: Fast Intake, TB, upgrade the air intake, misc.. and retune = up to 2.5k
Power adder: TVS 2300 + misc and retune = maybe 8-9k
I can't justify any of that on a car that I already had to put in that due to a spun bearing
and that's when I was living at home. Now with a home and young family to take care of the car is a second thought. I put/mod things here and there, but we are talking a couple dollars here, maybe a couple hundred there... I do hope to finish up a N/A build in the next couple of years, but other things have to be done first.
The GTO is more I could ever ask for.... I DD an Aveo5!!