The new Aimpoint T-2 is making making its way to the market. TheFirearmBlog posted up a video made by Jonathan Owen comparing the T-1 & T-2.
The T-2 looks like it has some nice little incremental improvements over the T-1, and but at this time I wouldn’t recommend throwing out your T-1 for a T-2. I really like the Aimpoint T-1 and highly recommend it.
The T-1 and T-2 cost more then some may want to pay. Then if your going to use one on an AR15 you generally have to drop about another $100 on a taller mount. If money is tight, look at the Aimpoint PRO. The PRO can be had for under $400, and has all the good features of the more expensive Aimpoints.