Just purchased a new 13 MacBook Pro with 4GB of Ram and the 2.53GHz Processor with Snow Leopard. Also purchased the Runcore Pro IV 256GB SSD
*note photo is 64GB but looks the sames as 256GB
(after reading this review http://blogs.zdnet.com/Apple/?p=3811 ) after receiving the MacBook Pro I did some basic speed tests before and after install. It came with a kit that has a case so you simply clone your HD then swap them out then use your HD as an external USB drive pretty slick.
Bottom line this is the fastest MacBook I have ever seen and I love it. Especially rendering video..wow what a difference. See my crude speed test in a video here: http://www.youtube.com/watch?v=VwF0b3vRuFQ
*note photo is 64GB but looks the sames as 256GB

Bottom line this is the fastest MacBook I have ever seen and I love it. Especially rendering video..wow what a difference. See my crude speed test in a video here: http://www.youtube.com/watch?v=VwF0b3vRuFQ