The X445 is great. What distinguishes it from the X460 is the feel. I think the shaft and head are well matched and gives a penetrating ball flight. Not as forgiving as the X460 but I just love the feel. Hit it on the screws and the ball flies. I have the 10.5 * as well and have not noticed any real difference in yardages on the simulator.
The ZR700 is a very solid driver. Very straightforward. Good distance, good forgiveness, but not even close to being as sexy as the X445.
The X445 is the sexiest, classiest looking driver I have ever seen. Never leave home without it!