I don't think you have to worry about damaging anything, but the performance increase you'll get by using the beta drivers should be pretty noticeable. You can get them here.
This is the recommended GeForce driver for the beta release of Battlefield 3.
Check here to see if your PC is ready for Battlefield 3.
New in Release 285.38
Increases performance in Battlefield 3 by up to 38%i.
Improves overall stability and image quality in Battlefield 3.
Added or updated SLI profiles for Battlefield 3, Dead Island, Diablo III, Dragon Age 2, Need for Speed: The Run, and Saints Row: The Third.
Fixed a performance regression in 285.27 beta running Crysis 2 (DirectX 9).
Read more about R285 drivers on GeForce.com.
Supports GeForce 6, 7, 8, 9, 100, 200, 300, 400, and 500-series desktop GPUs as well as ION desktop GPUs.
Installs PhysX System Software to version 9.11.06.21.
Installs HD Audio driver to version 188.8.131.52.
Supports OpenGL 4.2 for GeForce 400 series and 500 series GPUs and OpenGL 3.3 for GeForce 8-series and later GPUs.
Supports multiple languages and APIs for GPU computing: CUDA C, CUDA C++, CUDA Fortran, OpenCL, DirectCompute, and Microsoft C++ AMP.
Supports single GPU and NVIDIA SLI technology on DirectX 9, DirectX 10, DirectX 11, and OpenGL, including 3-way SLI, Quad SLI, and SLI support on SLI-certified Intel and AMD motherboards.
Supports GPU overclocking and temperature monitoring by installing NVIDIA System Tools software.
Users without US English operating systems can select their language and download the International driver here.
i - Performance measured vs. GeForce 285.27 driver on GeForce GTX 570 at 2650x1600 (DX11).
I've been running the same drivers on my EVGA GTX 460 with no problems at all.
Heavy is good, heavy is reliable. If it doesn't work, you can always hit them with it.