Because I started this thread, I feel responsible to share with you guys on what replacement I received from Dell. I've got a very nice machine from Dell.
XPS M1730, X9000 (2.8GB, L2 6MB), 4GB, HDD 320GB, Dual SLI 8700GT, etc.
This one seems a brand new one. i don't see a refurbished sticker at the bottom. The battery was also manufactured only one month ago in Japan. Given my original specs, I can hardly believe what dell sent me (probably this excessive upgrade occurred because the defective one gave electric shocks... not sure, though...... They may have taken it very seriously). My CC will expire in a few months and I can't extend it any more. I hope this machine will be solid and last long time. Thank everyone who provided helpful comments on this thread.
M1730 is a really beautiful machine!!