I've been impressed with the playability of the Acer XS Pro irons so I decided to purchase the Acer XV Tour Blade. Based on the COG location they should be awesome.
After some preliminary measurements, the weight of two of the heads are exactly to spec, the others are +/- 1.5 grams, with the exception of the 6-iron which is +4. I'm waiting on my cobalt drill bits to bring the 6-iron to spec.