New construction varies wildly by location and quality of construction, even on a per square foot basis. I know builders that can put something together for $70 per sf, and I know others that won't touch new build jobs for less than $110 per square foot - and both of them are good values at their respective prices, it just depends on the type of home you want and the quality of the finishes you desire. I've lived around in and around 77077 for most of my life, and I can confidently say that there will not be any new developments in that area in the near future, in terms of tract builders - the area is completely built out, with the exception of a large parcel of land that is being held privately west of Dairy Ashford. The family that owns it has not indicated any desire to sell at this time.
That means that if you wanted to build in the 77077 zip code, you would likely be trying to find either a vacant lot in the area (very rare) or would need to buy a home to tear down, and then build a new home on that site. In order to do something like that, you would likely want to make sure that the combined cost of purchase/destruction/rebuild would be such that if you were to ever sell that the market value would be at least close to the total outlay of funds. Due to the cost of obtaining the land and then the likely cost to build a home, this will be difficult to accomplish in the 77077 zip code for several years, but other zip codes closer in can easily support this type of endeavor today.
As Al mentioned before, the definition of "good" is highly subjective, and can vary depending on the criteria you impose. For recommendations of neighborhoods which fit the criteria that you desire, discuss it in more detail with your Realtor. They cannot answer questions which violate Fair Housing laws (such as race, creed, religion, etc) but can provide some general guidance depending on what you desire, or at least provide other portals of information where you can find the information you are looking for (such as crime statistics).
In terms of the investment value of a house, the old axiom remains true; the better investment relies on three criteria: location, location, and location. Ultimately, a house is just a house and whether it is new or old has less to do with its value than where it is. Now, new construction in established neighborhoods will generally command more than the original construction that you find in those neighborhoods, but that is usually because they are the only new construction in that location. Many times new constuction will have amenities that older homes cannot offer without major renovation, and size of construction has an impact on the value as well. So in conclusion there's not really a "better" investment whether you are choosing to live in new construction or a resale home - ultimately, it depends on what you have to spend, where you want to live, and the amenities that you are willing to live without (or the ones you can't).
As mentioned before, I have lived in and around the area in question for most of my life, and in addition I have relationships with builders who work in and around the area. My experience in working with them could be invaluable for you - If you would like more information, feel free to contact me via the information on web site below, and we can discuss your goals in greater detail.