Fyoung :
My 14 year old son has saved money from a paper route for the last three years in order to build himself a top-of-the-line gaming PC. Neither my husband nor I have ever done anything like this so we are ill-equipped to give him advice on which components to purchase. There is really no one in my family that is experienced in this matter either. Where can you go to get advice on a good build with a budget of approximately $2,000. All of these websites are so confusing in contradictory and our worst fear is that he's going to buy a bunch of computer parts that are not compatible with each other.
Before throwing money into this build can you ask your son to provide you with some basic information as to what his expectations are? Like the games he wants to play, the resolution he wants to play at and frame rate per second (FPS) performance?
Better yet, you can have him tell us directly since the minimum age to participate in this forum is 13 years old.
$2,000 is a lot of money to spend on a PC. He can definitely put together a high performance PC with that budget, but shaving off some money here are to for a little less performance, but still meeting expectations will mean more money left over to do other things like buying games.
James Mason recommended at liquid CPU cooler. While they are generally pretty good, it adds a little bit of complication into the build and there is always the danger of a leak occurring as a result of improper installation or a failed seal. Water and electronics generally do not work well together and I certainly would not recommend a water cooler for a first time builder especially if he is going to have a hard time saving up money for replacement parts just in case something goes wrong. A standard heatsink and fan cooler like a Cooler Master Hyper 212 EVO should be fine.
On a side note... you should do a bit of research before allowing your son to buy a particular game. Games have ESRB (Entertainment Software Rating Board) ratings them to give people a basic understanding what type of contents are in a game. It is kind of like a movie's rating system. For example, some parents would probably not want their young kids to watch rated R movies especially by themselves. Below is a link to the ESRB.
http://www.esrb.org/ratings/ratings_guide.aspx
Some parents are fine with their kids playing mature rated games though. There was one parent in this forum who was going to buy Grand Theft Auto 5 (GTA 5) for is young son even though it is a mature game because his son wanted to play it. He had no issues with the game's strong language, sexual situations or the fact that you basically go around killing people and stealing cars. It was all part of the fun. However, he changed his mind when I told him there is one mission in the game where you must torture another character for information to progress the game. That segment of the mission is only a couple of minutes, but it was enough to deter him from buying the game for his son.
Youtube is a great tool to search for game reviews. Not only can you listen to the review while you are doing other things you can also see some of the actual gameplay rather than just pictures in a written review. But written reviews can have links to videos.