I'm looking to pick up a refurbished MacBook or MacBook Pro for under $1k. I went to the Apple refurbished Mac page and found two options. One is a recent model MacBook 2.26 w/250 GB HD. The other is a MacBook Pro 2.26 w/160 GB HD. The MB is $850 and the MBP is $929. Seems like they have very similar specs, including the same NVIDIA GeForce 9400M graphics card, L2 cache (3 MB), system bus (1066Mhz), SuperDrive, etc. So what's the main difference between these two? The MB has a larger hard drive, yet costs $75 less. Am I basically paying for more upgrade capacity with the MBP?