The main reason people are recommending the i920/930 over the i5 750 and/or the i7 860 is because of the sockets each comes on. The 750 and 860 are on the 1156 socket. As of right now there have been no announcements of a 6 core chip on the 1156 socket. There are however already engineering samples of the 6 core i7 chip with hyperthreading on the 1366 socket. The NDA lifts on them in the next week (the 10th), so keep a look out for benches. Since we tend to run more than 4 WoWs when we box, it makes sense to plan ahead and go to a platform with a chip that has more than 4 physical cores, and that is what the 6 core chips will give us.