New PC for my grandparents

As I am sitting here browsing the forums I get an email from my mom, thay my grandparents are in need of a new PC, nothing really is salvagable from there old one (P4 socket 478) and since I will be visiting them this weekend they would like me to set it up to that rules out buying the parts myself and configurating it so it looks like im stuck with getting something from Best Buy or some other box store :(.

The budget is 500-700 US they already have a 22" Widescreen monitor and thats the only thing salvagable. They really dont need anything fancy all they do is check email, write word documents, stuff relating to finances etc, I dont think they even play flash games. Does anybody know of a good solid system. I imagine a $300-400 system would more than fit their needs.

What do you guys think would be a good system?

I am kind of worried about moving them over to Windows 7 but its so much more secure...
 
Solution
You should be able to salvage the optical drives and possibly the hard drive too, You could build a basic surf rig cheaply enough though, just have a word with them and explain that its a better option to build it.

having said that, if buying a system is the 'preferred' option, newegg do some complete deals from well under your budget to well over :)
http://www.newegg.com/Store/SubCategory.aspx?SubCategory=10&name=Desktop-PCs?cm_sp=computerstore-_-flashstorefront-_-desktops
if you copy all their stuff onto an external hdd and transfer it over once win7's installed it may ease the transition for them,
but for a general browsing system, http://www.newegg.com/Product/Product.aspx?Item=N82E16883114087
would probably do them for under...
You should be able to salvage the optical drives and possibly the hard drive too, You could build a basic surf rig cheaply enough though, just have a word with them and explain that its a better option to build it.

having said that, if buying a system is the 'preferred' option, newegg do some complete deals from well under your budget to well over :)
http://www.newegg.com/Store/SubCategory.aspx?SubCategory=10&name=Desktop-PCs?cm_sp=computerstore-_-flashstorefront-_-desktops
if you copy all their stuff onto an external hdd and transfer it over once win7's installed it may ease the transition for them,
but for a general browsing system, http://www.newegg.com/Product/Product.aspx?Item=N82E16883114087
would probably do them for under $300, have a look at the link for more though :)
Moto
 
Solution

I thought about a system like the last one you linked unfortunately it only has 4 USB ports, which will be filled to capacity, keyboard, mouse, printer, external backup. I found a decent Athlon 2 X2 system on best buys website for about 350 and since i tims is of the essence it would be best if i just got one from the store, maybe they will have net tops like that there which I might look at. Anyways thanks for the response.