I don't see a BOV on that list, if your still running the stocker I would swap that out, especially since you are planning on a bigger turbo.
After that I would definately upgrade the downpipe. It's cheap and can net you some decent gains for the price.
Also get an ebay cheapo intake. They work great and they are dirt cheap.
I would also recommend looking at a 20g for turbo size. An 18g is kinda a middle turbo between a 16g and a 20g and really isn't worth the money you are going to put down on it, especially for minimal gains. But I also agree with what TEMG said. If you have a big 16g its capable of making the 350 mark.
also to TalonEclipseMixGsx, The Galant VR4's are AWD.
And man are they the hottness!