What makes the most sense to buy, crossfire/SLI or one card with more ram

I'm doing some hardware replacing in my rig.... or upgrading :)

Anyway, I'm currently looking at graphic cards. And now i'm wondering if I should buy one of those 2 in 1 cards (ex. 4870x2) or just a "normal" card with more ram like GTX 295.

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I read somewhere that the whole two graphic cards in one wasn't the logical thing to do in the long run (for game developers and gamers alike).

My computer knowlegde is somewhat basic, i'm probably a 5 or a 6 on a 1 to 10 rating scale (pc skills, and general knowlegde regarding hardware).

So I pretty much have to believe most of what I read, or at least check into it like i'm doing now :)

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What would you guys say?

Instead of spending a large amount of money on top of the line cards now, I would wait till winter when the new DX11 GPU's are released. I only spend about $180 on my 4890 (I was upgrading from a x1900xt) and I would not have spent anymore.Luminouslight

ONE dual-GPU card is the logical, consolidated choice IMO.

Get the most expensive single card you can afford(HD 4890, GTX 275/285) and then upgrade to SLI when you can't run games well anymore.

P.S - The GTX 295 is a dual-GPU card, just like the 4870x2. It's got a GTX 260 and a GTX 280 in it.