I'd say that if you want a good computer that is a lot less worry free then don't get a refurbished one. I'm going to guess that that the bargain one you're looking at doesn't have dedicated graphics and the video card is teh suckage.
I'm also assuming you don't know about the Dell coupons you can use to get that inspirion you're eying for $300 less. The code now is VH508C1F12HNSN and Expires 8/16.
You can look up other wonderful laptop bargains at Ben's Bargains - Bargains, Coupons, Freebies
this is where my brother found his last lappy. This website is an index of links to other sites with good bargains outlined by a cool dude named Ben (I<3 Ben.)