All of the gaming consoles are made by Taiwanese manufacturers that have the majority of the parts created in red China. All three have an IBM processor, two ATI graphics and PS3 with Nvidia. So, most of the technology inside is American, albeit 3-5 year old technology.
The only money Sony or Microsoft makes comes from game publishers that need to pay licenses for their developer's to sell a game on a platform. The license makes up at most 5-8% of the total cost consumers spend on gaming and most of that goes to subsidizing the cost of the console (since Xbox 360 and PS3 are sold at a loss for the most part).
Meanwhile, retailers make at minimum 8-12% on every sale of console or game (more in the first several months of a game's release) and game developers make 30-40%. Both of which are mostly Americans.
So, to make a nationalistic argument is pretty silly since most of the money will be going to Americans in any case.
I think it's easier to make the argument against the Xbox 360 because it's higher failure rate could be seen as fleecing American consumers.