sjds, I didn't do any benchmarks with the previous system, I just saved the System Profiler report so I'd be able to compare with the new machine. I didn't think there would be any differences but as I already posted, there actually is.
The Momentus Seagate has as slightly less formatted capacity than the Hitachi did. I read the reviews for Hitachi and it got #3 on a list of drives from CNET, but I don't know how Seagate measures up. But that's off topic from the BSoD so I digress...
What I think I find the most interesting so far is that the fans really don't come on all that much on this one. They do ramp up, sometimes pretty high with max game settings on, but they don't stay on. Generally it seems to increase the fans slower and then they go to an inaudible level, coming back on later when screen action pics up a lot. Furthermore iStat reports temperatures never over 76C so far. I've tried dropping out of a game program right when the fans are really going and the graphics are working hard, and immediately checking iStat and like I said, never even hitting 80. The previous machine got all the way up to 100C quite speedily.
So I don't know if this is a matter of updated ROMs on the graphics chips and updated BIOS, or if it is just a matter of good chips and bad chips.
Keep in mind that this machine did not require any of the firmware updates the the first machine did when first running Software Update.
I've seen a few people picking up new machines from the store and not finding results that match mine. Mine is a completely CTO machine, which have a probability of being made more recently. Standard configurations are likely mass produced, shipped to distributors and outlets.. Who knows how recently a machine from a store is, even if you pick it up today?
Another thing I just noticed about this machine is that the battery is 100% with no cycles. My first MBP had a 95% Health battery with 2 cycles on it from the first time I powered it up.