Looks...okay to me. I'm not sure what your parents are going to do with an Phenom x4 and 1.5tb of hard drive. Personally I would think an Athlon x3 450 and 500gb would more than suffice for any "typical" parents. Even then, the only reason I say 500gb is that there is no tangible savings to be had by buying hard drives smaller than 500gb these days.
However, the combo deal you have there saves you more than purchasing a more "fitting" computer by buying separate parts so go for it. Therefore consider my comments purely educational.
Main: i5-3570K, ASRock Z77 Pro4-M, Asus GTX660 TOP, 500GB Crucial BX100, 2 TB Samsung EcoGreen F4, 16GB 1600MHz G.Skill @1.25V, EVGA 550-G2, Silverstone PS07B
HTPC: A8-5600K, MSI FM2-A75IA-E53, 4TB Seagate SSHD, 8GB 1866MHz G.Skill, Crosley D-25 Case Mod