New video card?

[Sven]

All right here's the deal, I want a new videocard. And I have got 200 euros.

Currently I have a HD5770 which is doing decent on medium detail, but with most land details turned off.

I want to experience this sim in the best possible way with the budget I have. Now I've thought of 3 possibilies:

1. Another HD5770 in SLI ( I think the cheapest option, but no idea how this will perform )

2. A new ATI Radeon card.

3. A new Nvidia card.

I've got good experiences with both brands, so I solely focus on performance on this one.

Has anyone got any suggestions? Would be greatly appreciated

My Rig btw:

AMD Phenom II x6 2.8 Ghz. proc
ASUS M4A786TD-V mobo
8 Gig DDR3 memory
HD5770