Affiliate Marketing Secrets

http://www.dell.com/us/p/inspiron-n411z/pd.aspx
i was thinking about getting the dell 145z 599.99 signature event offer.
or
http://www.dell.com/us/en/home/affiliates-coupon-laptops/fs.aspx?refid=affiliates-coupon-laptops&s=dhs&cs=19
this inspiron 17 r
I did not add anything to them.
Which one do you think is better?
Thanks.
..uses are for school.