I'll put it this way. I had an easy shot on a buck similar in size to these first thing opening day on my Idaho antelope tag last year. I passed and have no regrets about it.
These are on the small side, and if you've never hunted lopes before, you'd be robbing yourself of the experience of messing with animals that are definitely one off from deer and elk by taking one of them opening morning. Unless this is a unit with hardly any antelope, there's no reason to be in a rush.