If your son is going into animation then he will most likely be using Mac software. If you get him a Mac he can still use Windows as well on the Mac. Best of both worlds. Personally, I prefer the screen size and clarity of a 15” Macbook Pro. The more expensive Macbook Pro has a better video card. It’s 2k, but worth every penny IMO. He should get by with this laptop for at least 4 years.
Also check out the video for Full Sail U on the Apple website.
http://www.apple.com/finalcutstudio/in-action/
Pretty good chance that he will be using Final Cut Pro at some point as well as other animation products from Adobe, etc. He should learn his way around a Mac. It will be essential in that industry.
Actually, after the recent round of price cuts, and with the education discount, the 15" MBP is probably around $1500.