512mb high performance or 1gb stock HD 4870

I have a feeling this question will turn up a lot of different views... ow well here we go,
Im getting a HD 4870 and i have 2 in mind, the problem is that one has 512mb DDR5 memory but higher clock speeds ( http://www.newegg.com/Product/Prod [...] 6814121288 ) and the other has 1 GB DDR5 memory with stock core speeds ( http://www.newegg.com/Product/Prod [...] 6814102801 ) They are both right at teh same price and i don't want to spend more than this. Which one would u suggest if i am using a screen that runs at 1900x1200. I do play games some, but not a ton, so that shouldnt be a huge issue. any ideas?

I would probably go with the 1 Gig version. You can probably OC it to 790/1100. My 512 Meg 4870 is set to 790/1100 thru CCC, if I want the added Speed. The 1 gig is better for the Higher resolutions. Also look at reviews from a reliability standpoint.