The T1 and H1 both come in 2 MOA now, and realistically, I don't see much difference in my 2 or 4 MOA versions of the H1. Both give me about 3 inch groups at 100 yards, both are easy enough to use at further distances, and both of them are quick up close. If I need a bigger 2 MOA dot, I'll turn it up. If I need a smaller 4 MOA dot, I'll turn it down. But what I like so much over the PRO, and why I'll eat the cost difference in the future, is just how little FOV the body of the optic takes up. It's very low profile.
As for mounts, if you decided to go for a new one, it's very hard to beat one from LaRue. $626 from LaRue for an H1 with their mount, versus $617 almost everywhere with just the regular low weaver mount, or $608 or so for one without a mount at all. Plus, LaRue will send you almost $60 worth of other stuff, just for ordering. The mount alone is worth about $100, and is essentially free when you buy it bundled. I like it a lot, the QD is fantastic and returns to zero, and it's built like a tank. You could also check out the Daniel Defense mount, they were listed as discontinued at Brownell's and I got it for $50, and it's a great mount too. I like the LaRue better, but the DD is very light.