I think where you are hunting and the conditions are going to be big factor. I hunt mostly in the timber and we can legally hunt 30 minutes after sunset. Sunset was at 4:53 this afternoon and I was still in my stand. I had an 8 point about 60 yards away in the crosshairs of my VX5-HD 3-15x44 at 5:20 and could have easily taken him had I wanted too. Five minutes later that same shot would have been a no go. It was cloudy, overcast day though. So basically the VX5 is just good enough for my 52 year old eye (yes that's an intentional singular) in the conditions I hunt in. My sight is noticeably darker than it was a few years ago as well. On a better day, sitting over a food plot or some other open area, or under a full moon, I'm sure it could get me in trouble.
I hope to put together a 243 for the kids this offseason and I think I'll try a Swarovski Z3 on it. I've never owned one but I've read a lot of posts that claim they hold their own against scopes that cost 3x as much.
I'd love to try a S&B Polar but I just can't justify the price tag.