Building a new rig, some advice please

[loghinu]

Hello. I'm looking into building a new PC, mine got old and grumpy. I don't know how much i'm gonna spend on the new rig(not too much). I don't want the ultimate gaming media nor something low-end. I want something mid-range, something decent.
I want a mobo with AM3+ socket, so an AMD processor(Phenom, most likely). Also, the mobo must have two PCI express 16x slots, at first, one video card is enough, but i'd like to have a second slot for further upgrade.(SLi or Xfire)
Regarding the video cards, i'm not sure what to choose. A friend told me that Radeon works better with AMD processors than nVidia. So that's why I ask you, please share your opinions and recommendations.
Also regarding the PCI slots, is there a big difference in performance if you have one video card in 16x and one in 8x, instead of having them both installed in 16x slots?

Thank you in advance.
Loghinu (log-inn-oo)

 

[cutebeans]

That's easy!

Phenom II x 4 955
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103808&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-RSSDailyDeals-_-na-_-na&AID=10521304&PID=4176827&SID=1dkigd1t5x7ti

Asrock Extreme4 Am3+ Motherboard Dual 8x
http://www.newegg.com/Product/Product.aspx?Item=N82E16813157262

Corsair TX750
http://www.newegg.com/Product/Product.aspx?Item=N82E16817139021

GPU < Not sure about your budget so I would suggest this. If you can go higher then get a 6950.

ATI 6870
http://www.newegg.com/Product/Product.aspx?Item=N82E16814102948

About the CF 16x and 8x. When you crossfire, most would say dual 8x, which is actually pretty good.

Both GPU would perform at 98% of their capacity.

Radeon and NVIDia GPUs work the same regardless of the processor used.

 

[BohleyK]

Wont need 750W for dual 6870's. 650W of an 80+ bronze PSU will do the trick.

 

[cutebeans]

Yeah, but he might go with a 6950 if his budget allows though.

 

[loghinu]

Alright. So, should i go for Ati instead of nVidia?

 

[DelroyMonjo]

lujlin,yoi night conside going to dvjool

 

[loghinu]

I'm decided on the processor. AMD Phenom II X6 1075T, if the budget doesn't allow a radeon 6970, then i'll probably keep my old 9800gt untill i'll get the money. I'm not looking into overclocking anything, so i think i'll be better with this non-''Black Edition''. Your opinions, regarding the processor?

 

[FinneousPJ]

It only makes sense if you need six cores. It's not like the Black Edition is somehow detrimental.

 

[loghinu]

Well, I need it for games(right now, Flight Simulator X) and future high demanding games... and some CAD applications. Isn't it worthy?

 

[loghinu]

also, some audio processing and recording for guitar, and a little bit of video editing.

 

[loghinu]

It only makes sense if you need six cores. It's not like the Black Edition is somehow detrimental.

Look, I know i'm getting a bit greedy. But i'm thinking about keeping it longer. Here's how I thought:
I'd better give some extra bucks right now, so for the next few years, my processor doesn't need to be changed. Who knows what high demanding software will be out there in the near future?
Thanx.