1.) no problem..
2.) as long as your not gaming then the GT430 is a good choice.
2b.) the GT430 will work on your current power supply.
3.) you can always upgrade the processor in that unit to a higher clocked C2D (you currently have) or possible quad (not sure yet, have to check..)
cost of refurbished or used cpu $100 +/-
4.) my personal opinion is the Intel chips runs better with nVidia cards - not trying to start an argument with anyone, my opinion..
OK, i have bought the GT 430. Your advice has been invaluable. Thanks very much. Hopefully it will keep me going for a while until I need a new machine - I don't do gaming so hopefully it will work just fine. When its all ready I will move over to it and see how I get on. Got to be better than what I am using at the moment - my 6 yr old Pentium 4 - Its really struggling with the 3D poor old thing.......
If you have time and can let me know about the possibility of upgrading the processor on the Core 2 duo then I would really appreciate it.