Thanks for the comments. Having looked around a bit more, I see that, in addition to the MSI GT70 0ND-444US, there is also an open box Toshiba Qosmio X875-Q7190 for almost an identical price.
They also have near identical specs. I've only found two differences even worth mentioning:
1. The MSI's GPU is a better (GTX 675M instead of Toshiba's GTX 670M; from the benchmark's I've seen the difference is small, but consequential).
2. The MSI is a lb heavier. As you note dave, 8.5 lbs is slightly ridiculous. I plan on taking this around with me a lot of places, so I wouldn't mind it weighing a bit less.
(The MSI has a Blue-Ray player, but I don't own a single disc, so I don't care about that.)
Should I just decide which difference is more important to me and go with it? I've tried searching the internet to get a feel for customer service and reliability with Toshiba vs. MSI, but am still not sure if one is better than the other.
Also, could I install an SSD in either one of these? I would especially like to do so while leaving the HDD in.