AMD or Nvidia

My question is probably simple but complicated
I am wanting a new MOBO for my PC. I want an AM2+ board for the future. There are many AMD boards out there and most of them with non nforce chipsets. I want to stick with Nvidia graphics cards. Is it then recommended to stay with an Nforce board or can I go with say a 790GX board? I am getting the 260GTX from Nvidia and just want to get the best performance out of it.
The main reason I ask this is also because I currently have a 590sli board which states a performance increase when paired with a geforce card. I want to upgrade the mobo but do it smoothly while keeping my install of vista in tact ( really dont want to reinstall windows as I have lots of crap on there!)

Yeah, I usually do a clean install just really dont want to this time around. I typically upgrade about every 12months. The FX board.. Ill check that one out thanks. Yeah Im not too concerned about integrated grfx just a good board for the money. Most of the nforce boards are about 140+ and I was hoping to stay around 100. I know Im cheap but thats how it goes lol.

So AM2+ for the future? You do know they are coming out with new processors and chipsets right around the corner, yes?

I have a BIOSTAR TFORCE TA790GX A2+ AM2+

http://www.newegg.com/Product/Prod [...] 6813138128

That I run with an 8800gt. I have the latest ati drivers for the northbridge installed and the latest gforce drivers and no issues.

This is a budget board but I have been able to oc my AMD9850 from 2.5ghz to 3.2, I run 3.0 day to day for thermal/safety reasons. Anyway the two driver packages can work together in harmony, I score 12000 in 3dmark06.

I used to score 11000 on my 590sli crosshair mobo with my fx-62 clocked at 3.15 ghz using that same 8800gt.

But were I to make that decision right now, I'd get an HD4850 knowing that I could crossfire down the road which I plan on doing anyway.

Honestly, I don't like either of those boards.
I am waiting for the newer boards because I hear good things about phenom 2. They have an asrock board that is am3 ready but it appears out of stock at this time.

If you can't wait , why not look at the nrforce 8000 series? They have hybrid sli and the boards are in your price range.

The chipset won't make any difference unless you're planning to do SLI or Crossfire.

You will have to reinstall/reactivate Vista. There's really no way around it if you're changing the mobo.