Azbroncfan, if I were you, I would build a 6x284 for the following reaons;
1. Lapua Brass
2. Better bullet selection
3. No fireforming
I guess it also depends on what bullets you want to shoot. The 6x284 with a 30", 1-12 twist barrel will push a 75grn V-Max at 3950fps, the 87grn V-Max at 3750fps.
If you go with the 1-10 twist barrel, the 6x284 will shoot the 87grn V-Max very well and it will shoot the 105 and 107grn bullets well too. The 6x284, with a 30" 1-8 twist barrel barrel, will push a 105 and 107grn bullets at around 3450 to 3500fps.
The 25-06 AI is a good cartridge too, however, you have to do a bunch of brass prep and fireforming in order to get what you want out of it. I don't think all the case prep and fireforming is worth it.