Hi all, looking for upgrade advice and this is usually my first port of call 
Firstly my current spec:
MSI K9A2 NEO http://uk.msi.com/product/mb/K9A2-Neo-F.html#/?div=Detail
Nvidia 9800 GTX+
AMD Athlon 7750 x2 @ 3.0ghz
4gb DDR2
Win 7 64-bit
Currently only play at 1440x900 but I'd like some headroom for upgrading my screen in the near future. Would be great to play the latest games at good to high graphics levels. Struggling at the moment!
After reading many reviews and benchmarks I am thinking of upgrading the GPU with one of the HIS 6870's on offer at OCUK and probably replacing the CPU for an Phenom II X4 955 or Phenom II X6.
My main concern is do you think my current motherboard will hold everything back and is it worth putting this level of kit onto what is probably considered a dated motherboard?
If so I may be tempted into a new i5 2500k build, but would much rather make use of what I have to keep costs down.
Any help much appreciated.

Firstly my current spec:
MSI K9A2 NEO http://uk.msi.com/product/mb/K9A2-Neo-F.html#/?div=Detail
Nvidia 9800 GTX+
AMD Athlon 7750 x2 @ 3.0ghz
4gb DDR2
Win 7 64-bit
Currently only play at 1440x900 but I'd like some headroom for upgrading my screen in the near future. Would be great to play the latest games at good to high graphics levels. Struggling at the moment!
After reading many reviews and benchmarks I am thinking of upgrading the GPU with one of the HIS 6870's on offer at OCUK and probably replacing the CPU for an Phenom II X4 955 or Phenom II X6.
My main concern is do you think my current motherboard will hold everything back and is it worth putting this level of kit onto what is probably considered a dated motherboard?
If so I may be tempted into a new i5 2500k build, but would much rather make use of what I have to keep costs down.
Any help much appreciated.