You own both, have backups of what you can't lose, images to restore them to working condition so what would you be paying for? (it's not clear from your post.)
I have a
Dell Latitude E6510 laptop with Windows XP Professional, Version 2002, Service Pack 3 with Intel I5, M 560 @ 2.67GHz, 2.66GHz, and 3.42GB RAM. I use this for all of my personal and home-based business (mostly Microsoft Office and Internet searching). The Dell Gold Support expires in February, 2014.
Lenovo Ideapad S10e with Windows XP Home Edition, Version 2002, Service Pack 3, with Intel Atom, CPU N270 @ 1.60GHz, 1.32GHz, 0.99GB of RAM. My Mom uses this to play off-line Solitaire and goes online to use Ancestry.com. The Comcast Signature Support expires in January, 2014.
Do I keep either/both and upgrade somehow (can I upgrade to Windows 7? Renew their respective Support or get other?