Looking for some BF mobo compatability advice

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I've got two p5w dh deluxes, both need new 2 gig sets of ram (would I really see that much improvement from 4 gigs?) and one needs a new graphics card, I've already got a 1900 xtx Any suggestions on Black Friday / weekend deals that would go well with this mobo? I had OCZ but it burned out and I don't really want to go with a smaller brand again. Could I use PC2 8000 to improve the OC? Something like this: http://www.newegg.com/Product/Product.asp?Item=N82E16820146563 but I'm not looking to shell out another grand for these setups.