If I switch from an a new macbook Air to a refurbished quad core macbook pro will I notice a huge speed difference, especially noting the fact that the air is a 128 SSD while the the pro is a 500 HD? Air: 11-inch : 128GB 1.6GHz dual-core Intel Core i5 processor 4GB memory 128GB flash storage1 Intel HD Graphics 3000 Pro: Originally released February 2011 15.4-inch (diagonal) LED-backlit glossy widescreen display, 1440-by-900 resolution 4GB (2 x 2GB) of 1333MHz DDR3 SDRAM 500GB Serial ATA @ 5400 rpm 8x double-layer SuperDrive (DVD±R DL/DVD±RW/CD-RW) Intel HD Graphics 3000 and AMD Radeon HD 6490M Thanks in advance for your responses! Side question: What is our current most accurate estimate as to when new pros/airs will be released: April? June? As early as March?