Memory is cheap at the moment, probably around 50€ for 2GB.
Motherboards can be cheap too, although I would probably go for Asus on my next upgrade again, between 40€ and 120€.
I would not save money on the graphics card though when you can get a really good card for a little more money, at the moment I would probably go for nVidia GeForce 8800 GTS, which costs around 250€ ( http://www.theinquirer.net/default.aspx?article=35618 ).
Motherboards can be cheap too, although I would probably go for Asus on my next upgrade again, between 40€ and 120€.
I would not save money on the graphics card though when you can get a really good card for a little more money, at the moment I would probably go for nVidia GeForce 8800 GTS, which costs around 250€ ( http://www.theinquirer.net/default.aspx?article=35618 ).