Mike,
I have used the Eagle GTs (not GT2) several times, they were good tires, but they did not seem to last very long, but they stuck to the road really well. I have also used Radial T/As many times on different types of vehicles, and they seemed to last a long time, with better milage, but did not stick to the road like the Eagles. Right now I have Radial T/As on my wife's van, and have about 25,000 miles on them, and they show little wear. I have Goodyear Eagle LS on my 300M and they have about 32,000 miles on them and just now starting to show some wear. My Vette has the Eagle GTs, and they are pretty worn out, and have only about 12,000 mile on them. The GT 2's are probably made better though.
I would be tempted to try the GT2s at least once, since the price is about the same.
Bill