Need New Video Card Advice

So I got the new GTX 570 from Newegg today. I can't obviously use SLI on a 275 and 570 ones
two big or two small depending on how you look at it for the SLI Bridge to work....

So should I take out both the 275s and just use the 570 or keep a 275 in and use it as a
physX card? I can't bridge them together... Would I be getting DirectX10 Quality physx as its a DirectX 10 card, thereby loosing some benefit of a nicer looking Physx experience?

Or should I just go with 1 card that being the 570? Let it run everything and physx?

Depends on how many PhysX games you play. No sense in wasting energy having a card in there that never gets used.

it will show as direct x10 physixs though instead of the directx11 physixs if I were using
one card wouldnt it? hence now that i've got more horsepower under the hood wouldnt i be
better making it look prettier too?

What's the consensous then?

So will I get DX10 Physics with the 275 and things not look as polished if I were to use the
570 as stand alone? Since it has DX11?

thanks for clarifying Wes!

Sell both of the 2 275's and buy another 570 with that money and then SLi those. That would be the best option. 2nd option would be to use the 570 as the main and one of the 275's as PhysX. Then again, not many games support it so I would sell the 2 275's and get the other 570.

That's me though.