Those are great choices. The only two I can think of I'd add in there are the Vortex Diamondback and the Nikon Team Primo's. The Burris would probably be my choice though.

I've tried Leupold VX-I's and I don't think they are good at all. I've owned two. Both have quit holding zero and had to be sent in for repair. Neither are that impressive in low light or even clarity during the day. The friction adjustments suck. I just don't see anything really good about them. Aren't they supposed to be the same as the old Vari X II's? I compared them to a Tasco and Simmons during daylight and couldn't tell a difference. A few friends looked through the Tasco and the Leupold as said the Tasco seemed clearer. I couldn't see a difference though. In low light I compared it to 2 Simmons. In both cases I could see slightly more with the Simmons but it wasn't a huge difference. Both kind of sucked. I'm not saying get a Simmons or Tasco, because they certainly aren't the most quality scopes out there. That's why I think the Leupold is so bad, because they were just as good or better. Plus they have held up for years where as the first Leupold had to be sent in for repair 2 times in 2 years. The second one I got repaired then sold it.

The Burris Fullfield II I have blows both the Leupold and the cheap scopes out of the water clarity wise both at day or night. When comparing side by side the difference is amazing. The Burris is a great scope, actually holds zero, and actually has decent turrets that you can hear and feel click and that actually move the cross hairs where you tell it too.

Now I've heard the VX-II and up are a ton better. However, I'm hesitant to give them a try after my experience with their cheaper scope. Plus from everything I've read, while they are better you can still do much better for the money with other brands.