need an opinion on sli

i currently own Asus M2N- Deluxe http://www.newegg.com/Product/Product.aspx?Item=N82E16813131013

and have 1 Evga 8800GTX http://www.newegg.com/Product/Product.aspx?Item=N82E16814130072

im planning to SLI soon BUT i have Sound Blaster x-fi http://www.newegg.com/Product/Product.aspx?Item=N82E16829102005

on one of the bottom pci slots... my question is IF i sli the 8800s will my sound card get fryed from the heat getting blown on? or will my 2nd gfx card would die due to overheating.... AND if i need a new mobo which mobo should i get (prefer intel cause of the price cuts coming soon)

forgot my case is http://www.newegg.com/Product/Product.aspx?Item=N82E16811144089

all my cooling is stocked and i don't plan on overclocking cause of pass experiences

im planning to sli around late august and just want a heads up.. btw i DO run everything on high res... so my box runs around 30C all the time

i ran oblivion on ultra high settings and had around 35 fps :(