I have never built a computer before so I read about the components and watched the Elithecomputer guy how-to video but that's my background in the field. My question is whether or not these components will work. One issue I had was figuring out how many watts I need as a power source as it did not tell me on the graphics card site or the motherboard site. Also, I want it to be able to run ubuntu without having to do anything weird (I have a Qosmio laptop and it doesn't seem to work). Below are the links to all of the items. It's my first time asking something like this so please tell me if I left any information out. Thank you 
tower http://www.newegg.com/Product/Product.aspx?Item=N82E16811119160
screen http://www.newegg.com/Product/Product.aspx?Item=N82E16824113040
motherboard http://www.newegg.com/Product/Product.aspx?Item=N82E16813131876
Graphics Card http://www.newegg.com/Product/Product.aspx?Item=N82E16814121896
PSU http://www.newegg.com/Product/Product.aspx?Item=N82E16817139048
Thermal Paste http://www.newegg.com/Product/Product.aspx?Item=N82E16835100007
Processor http://www.newegg.com/Product/Product.aspx?Item=N82E16819113347
RAM http://www.newegg.com/Product/Product.aspx?Item=N82E16820239638
Blueray http://www.newegg.com/Product/Product.aspx?Item=N82E16827129075
Keyboard http://www.newegg.com/Product/Product.aspx?Item=N82E16823129032

tower http://www.newegg.com/Product/Product.aspx?Item=N82E16811119160
screen http://www.newegg.com/Product/Product.aspx?Item=N82E16824113040
motherboard http://www.newegg.com/Product/Product.aspx?Item=N82E16813131876
Graphics Card http://www.newegg.com/Product/Product.aspx?Item=N82E16814121896
PSU http://www.newegg.com/Product/Product.aspx?Item=N82E16817139048
Thermal Paste http://www.newegg.com/Product/Product.aspx?Item=N82E16835100007
Processor http://www.newegg.com/Product/Product.aspx?Item=N82E16819113347
RAM http://www.newegg.com/Product/Product.aspx?Item=N82E16820239638
Blueray http://www.newegg.com/Product/Product.aspx?Item=N82E16827129075
Keyboard http://www.newegg.com/Product/Product.aspx?Item=N82E16823129032