I have an older set of 10X50 Bushnell's that work out pretty good. Decent in lower light and plenty of magnification. They aren't so heavy that you will wear your arms out holding them up, and built well enough they will handle almost anything short of a big fall on cement.
I've used them in hunting, chasing, surveillance, and comet watching. They really do work out pretty well. They aren't Steiners, or Leupold's, but for $50 they work out rather well. Compared to a set of 12X60 (I forget the brand, but they were a $1K set) we used in competition shooting, they held up fairly well. Not quite as bright, not quite as sharp, but adequate for our uses. After all, we're comparing an apple and orange here, eh?
I would suggest you look at a minimum of 10X50.
JD