Nervous, IMO if that is all you use it for and you are not designing anything on it or doing major database queries just get what PC or Laptop looks good to you and get a EXCELLENT service plan.
Truly I think it might be time for you to move to a laptop. You can still hook it up to your keyboard, mouse, and monitor if you so choose and sit at your desk. You can also take it with you or sit in the Den and use it while you watch TV.
Lenovo has some of the best laptops if you pick the ones that are on the old IBM Thinkpad Frames. (most have the center tippoint mouse that sits in the middle of the keyboard that is a inverted rubber piece sticking up)
If you do go with a laptop and don't mind they extra $$ a solid state drive is indeed as Nebrois pointed out are much more stable and speedy.
But really you could just get something like this
http://www.dell.com/us/p/inspiron-15r-5521/pd put Windows 7 on it to stay closer to the version you are used to instead of going to 8 and after you get accustomed to that version of windows I think you will be happy for some time.
I don't know if you would be happy with just a pad, like a Ipad or other windows based pads. I for now would steer you away from them. HHGregg right now has a cheap one at $69 so that would be a easy way to see what they are about.
I don't like HP but even this might not hurt. lol
http://www.walmart.com/ip/Back-to-Colle ... r/10966053 except for Win 8. ...don't really know you would be happy with that until they patch the start menu back in.
Buy American, the job you save just might be your own.