I am biased toward the Site Lite. While i was at McDonnell Douglas in the 80's Rich Langner (inventor) was a quallity engineer there. I took photos of his first prototype that used a flashlight buld and a reflective target.
Fast forward to today with lasers and i still love his product. I introduced a "intel guy" who is a friend to Rich at the Shot show 3 years ago. He was heading back down range to spooky places in A-Stan and had close ties woth NSW folks there. Rich gave him a Site Lite with adapter for up to 50cal.
Once the NSW guys got it, they used it to bore site a 50 cal on a RG31. They did it "inside the wire" and then "took it out to the range"
It worked so well they actually wrote a report on it and sent that via my friend to me and i fwd that to Rich. The NSW snet that up their COC and suggeted this should be looked at buy all NSW groups.
I always use mine for everything from 10-22 to 308. You can download a program for selected round and print out a target to use indoors before you head to the range. It has worked well for me.
It will also drive the cats crazy