I have a barska that I picked up used for cheap. I put it on my .22. It's not a complete piece of junk, but its not that great either. Up there with a 40 or 50 tasco I would I say. I haven't had it out in any crappy weather to see if it fogs up or not. I don't know anything about the others you mentioned. The one I have is a 4-16 power with a 50 mm udjustable objective. I wouldn't put it on a .243 that's for sure.

Paul