What do you mean by $498 after cashback? Is there a mail in rebate or something? Also, where abouts are you located? If your in north america you could probably get a better deal than that.
For example, if you were in canada you can get pretty much the same thing with twice hard drive space for the same price.
http://www.thesource.ca/estore/produ...roduct=2510301
And that is from the source, you could probably find a better deal if you look elsewhere.
Otherwise, it's an alright computer capable of doing what you need it to do, so if there are no better deals where you are, then I'd say go for it.