I think you should look for a metal constructed easy adjustable sight. There are lots on the market. You don't have to spend tons of money either. I think Rick James mentioned the Cobra Mini Venom, This is the sight I use and I think it's great.

If I had to change anything on it I would like to see a metal guard instead of the plastic one, but I'm not convinced the guard is that big a deal and the rest of the construction is metal. What I do like about it is with the exception of the actual sight pins, all other adustments can be made without an allen wrench. This makes life alot easier when first getting everything sighted in. I also like the compact design. I'm not a big fan of having a huge sight sticking out getting caught on everything. No it doesn't have all of the bells and whistles on it but it's sturdy and reliable.

Are there better sights on the market, you bet your a$$ there are, but if all you do is hunt, for the money it's hard to beat. I can buy any sight I want...hell I can buy a thousand sights (or bows for that matter) tomorrow if I wanted to. But come fall I will have my same Browning Boss Tracker bow with the same Whisker Biscuit rest and the same Cobra Mini Venom sight on it shooting the same .006 Carbon Express arrows and I will kill deer like I always do.

As long as your equipment is sturdy and reliable (don't buy junk) the thing you need to worry about the most is the guy pulling the string.