Glenn they look like nice choices. I believe the GTX series are fond of boost, something you might want to consider researching considering the modest boost you are running now.
fyi mine is a GT3071, not GTX. I reckon its shade too laggy but with a 2.2 it is near perfect. Have a look at the graphs on my build thread for 2.0 and 2.2 and various turbos, keeping in mind the 2.2 numbers on 98 pump not E85.