There are two kinds of waders: Those that leak and those that will leak.
The real question is, when they leak will they have warranty service to stand behind them, or can you manage the leaks yourself. If you are not sure you can manage it, I'd suggest finding some that will have a good warranty. I started with a super cheap pair that lasted quite well, the next couple of cheap pairs were very problematic. I've since gone to more durable waders with great warranty service. The ones I use now may keep me faithful to their manufacturer, they may not.