Apple's new 13-inch MacBook Pro received the biggest upgrade of the lot. The advantages are numerous. You get much better CPU performance over the previous generation. In fact, the new 13 can outperform last year's 15 thanks to Sandy Bridge. The new 13 is quite possibly the best balance of portability and performance. It's the single largest upgrade you'll find in the lineup. If you own a previous generation 13-inch MBP, the upgrade is 100% worth it -AnandTech
No two ways about this: the new MacBook Pro is the fastest laptop we've ever tested, hands-down.
-->Twice as FAST next generation dual core intel processor,
-->FACETIME HD can make 720p HD calls
-->Thunderbolt - 20X faster than with USB 2.0 and up to 12X faster than FireWire 8 - can daisy-chain as many as 6 devices
-->new SDXC card slot up to 64GB
Next-generation quad-core and dual-core Intel processors.
2.3GHz Intel Core i5 processor or the fastest dual-core processor available --, performs TWICE as fast as the previous generation.
FACETIME HD & FASTER GRAPHICS!
The integrated Intel HD Graphics 3000 processor. It encodes video quickly, making HD video calls with FaceTime possible. And it decodes efficiently, so you get long playback time for DVDs and iTunes movies.
camera built into the MacBook Pro display is even thinner than the camera inside iPhone 4.
20X faster than with USB 2.0 and up to 12X faster than with FireWire 800. more than enough bandwidth to daisy-chain multiple high-speed devices without using a hub or switch. For example, several high-performance external disks, a video capture device, and even a Mini DisplayPort display to a single Thunderbolt chain while maintaining maximum throughput.
Thunderbolt I/O technology provides native support for Mini DisplayPort displays. It also supports DisplayPort, DVI, HDMI, and VGA displays through the use of existing adapters. So you can connect your Apple LED Cinema Display or other existing display, along with multiple high-speed devices, all from a single port
NEW SD CARD(SDXC)
new SDXC card slot on the 13- and 15-inch MacBook Pro models supports up to 64GB cards and makes it a snap to transfer all those photos to and from your MacBook Pro, so you can edit and share them on the spot.
more details on the features here:
***I was told this review was used for a Macbook pro on sale on Craigslist for $1000... $1200 + tax http://newyork.craigslist.org/mnh/clt/2400583024.html