You really have to compare optics side by side at the same time, during daylight and at dusk, and each on a separate tripod, to really see and appreciate the differences. Once you notice the differences, it is hard to ignore them, for me at least. Quite a few people who think their lower-end optics are "just as clear" don't know what they are missing until you can point out CA, depth of field, edge clarity, pin cushion, eye relief, FOV, etc. Not everyone needs top-tier glass, but if you want the best it is nice to actually see and experience the differences between models rather than trying to rely on memory or a reviewer's opinion.
Right now, I have the 15x swaros, and I do think they are the best you can currently go with, but I have owned a number of different brands. The Meoptas are a good choice, but I think there are subtle differences optic snobs will notice. Are you going to miss a coues deer opportunity because you went with meopta over the swaro? No, probably not. The zeiss have too many flaws, as do the mavens. I owned both at one time. The leupold should not be in the discussion. Rumor has it swaro has a new 15 in the pipeline, so you should be seeing some current models hit the used market soon. Whatever you do, I would either buy through at a discounted price (if you can) that you can resell without a loss (direct through a guide or pro price at a 20% or 30% disc) or buy through a retailer that allows free returns. You don't want to be stuck paying retail with optics you are not happy with. Buy two or three pairs if you can and keep what you personally like the most because it really will come down to personal preference. You will not regret the extra cost over years of happy use.