TFixer5 Ventus (w/Velocore) Blue is my other choice/consideration for my TSi3 driver, but I'm actually even more interested in a Ventus Red 6S, for my TSi2 3W.
I recently installed a GD Tour AD-UT 85 S in my U500 and really love the way it feels, so am leaning towards another Tour AD for driver.
How'd the fitter convince you the GD Tour AD HD wasn't for you? Strictly numbers?