I quoted it from the "Tech Reference" sticky on this forum. 05 is "modern" and I believe any recent Subaru's have the top feed coolant system that continues to move it through the system.
I am really happy with my Cryotune. Dave is amazing, and if you are just changing out turbo (not looking for major gains), he will be a good resource. I would send a PM to "Cryo" here or go to his website
and send him an email. I totally trust his opinions and he's easy to work with through the tuning process and I have nothing but great things to say about his service, communication, and the results of my tune
There are other options as well. There are some tuners up in your area and other etuners as well.