definatly get a bigger power supply. A friend of mine got a AMD 64-bit 3200+ and only got a 250 watt PSU. A huge difference.
I personally haven't heard much about samsung, but yes, the corsair is excellent.
For monitors, sadly, I prefer the CRT, a good quality one. You just can't get the same color reproduction on a LCD that you can a CRT. Sure it's bigger, and the resolution isn't always as great, but a good video card (which you have) will take care of that.
As for motherboards, I've heard good about ASUS in general, I prefer MSI for AMD 64 bit
I do have to agree, if you don't know what overeclocking is, you don't want it.
mad props for the LG drives.
Everything else, I think your fine.
Good luck with your system, enjoy it.