Warning: whatever you do don't buy electronics here. Their 90 day return policy is unbending, even if your computer breaks down on the 91st day.
In my case, after 3 hours on the phone with the costco tech support service, they're having me send my computer out for Dell, which means I'm out of a computer for 2 weeks while it's being repaired. To have to send a 4 month old computer back to the manufacturer for repair means it's a lemon! Costco is great for froyo and family packs of yogurt and lightbulbs, but I'd be really wary about making another major purchase here.
I've had better experiences at actual electronics stores for purchases like this... in my experience, it's worth the extra $ to get a computer from an actual electronics store.
Monetary Loss: $600.