If you are a rough carpenter by trade like I am, you already know that estwing's will hurt your elbow after much use due to vibrating, and that heavy steel or titanium heads with hickory handles are the only way to go.
If you are looking for a hammer that will last just about forever and be used only seldom, and even then for nothing too hard, than by all means get an estwing. But to anyone who is just starting out as a constuction worker, your economical option is a stanley fatmax 22 ounce, and your better but more expensive options are deathstick brand hammers, either the $40 24 ounce steel version, or the $100 15 ounce titanium version that hits like steel without the effort. Although I have never bought one, Sears also makes some decent hammers, and if you were ever to wear out a milled face Sears hammer, or just want a new one, you could break the handle and make full use of there lifetime warranty.
For a homeowners hammer, a 16 ounce estwing would do fine. Although, you can get away with using a bigger hammer for a lot of small detail work, and the option is there to use it for bigger projects, so if you ever have any plans for any type of hard use, I would reccomend you get one of the above mentioned rip claw framing hammers, and never one with a metal handle.