New Build Power Question

I'm about to make my first build and I wanted to know possible performance and whether I have enough power.

CPU: Intel i7-860
Mobo: Asus Maximus III Formula
RAM: 8gb Corsair
HDD: WD 500gb Black Caviar
GPU: Dual nVidia GeForce 9800 GT
PSU: Antec 850W

I'm using an Antec 902 if that's important.

Also does anyone know how well this will work with Crysis, just as a benchmark? Thanks

Thanks a lot.

I was a bit partial to nVidia because I'm not a major fan of ATI GPU's but I hav seen a lot of reviews saying that ATI cards are better than their nVidia rivals.

The motherboard was also mostly out of bias because I've seen Asus products in action and I was quite impressed. I thought that getting the best quality Asus product would ensure I wouldn't need to upgrade the rig for a while or is that not really a problem?

Can you recommend a cheap xFire combo because I really wanted a dual GPU graphics system.

Thanks.

Thanks. I'll have a look at those.

I went on GPU review and I think the 9800 GT is the best that could fit the price range and have decent performance.

Also the problem is I'm in Australia so I can't get any products from newegg.

But thanks for the help anyway!

Thanks a lot.

I've decided on the evo from Asus because it's not much more than the pro and it actually has the sli bridge.

I'll consider it. I think it will be better because I have a little bit extra after swapping out the mobo for a cheaper version.

Meanwhile, I need to ask what may seem like a silly question, but what are the major differences between nVidia and ATI? Performance-wise, I mean.