If you want a great scope at a less-than used car price look at kowa. Kowa make a variety of models with 60, 65, 77 and 88mm lenses. IMO they are the best for the money under 1K for the 60mm.
Personally I would recommend to spend a little and get a used angled 65 swarovski. Not a big difference with HD to justify the price increase, but HD WILL help with color (color DOES make a difference when picking up game against rock or brush). My go-to scope is an ATM 65 HD, and I love it.
Second choice, a used leica televid 62 or 62 apo. Very compact and can be bougth for $900-1200.
The older generation green or silver zeiss are horrible for edge crispness and the eyepieces like to come unscrewed when adjusting the power. The new black zeiss scope are much, much better.
I started out with the gold ring 12-40x leupold, that was the biggest mistake and waste of money...
Unless you spend upwards of $1000 I don't think you will find anything that you will like, especially at 40x+. Larger lenses natually have a larger exit pupil and are more comfortable on the eye, however the twilight and heatwave difference was not enough to justify the extra size and weight for hunting, imo.