The aoshima one looks the part for you scion people. You could probably combine parts from both kits to creat an accurate scion. I get my real BRZ in August 2013 (12 month waiting list, I was not ordering one till I test drove one), and obviously I want to model it. If aoshima brings out a version of its kit with full engine detail I will get one but I may combine aspects of the tamiya version with the aoshima version. All a matter of timing.
Ben