Hi. To start off, I own a MacBook Pro 13" Mid 2009 (Intel Core 2 Duo). Both SATA connections are SATA 2 (3Gigabit). I am planning to replace the optical drive with a new 120-128GB SSD. Now to the questions: 1. Considering my model and SATA connections, does it matter if I put the SSD in the main bay or in the optical bay? 2. I've been told that a SATA 3 SSD will have the speed of 1.5Gigabit on a SATA 2 motherboard. Should I get a 3G or 6G SSD? (Is that even true?) 3. What SSD should I get from the following list (higher price to lower): Intel 320, Intel 520, OWC Mercury Electra 3G/6G, Samsung 830, Crucial M4, Intel 330. 4. Is this product a good HDD caddy? Thank you very much!