Thinking of getting an SSD to replace one of my 500GB HDDs in my 17" mid-2010 MBP (I have an optibay). I'd change the drive that has OS, apps, and my music projects and samples for better performance (leaving the photos/mp3s/movies/everything else on the 2nd HDD). Much as I'd like a 480GB/500GB one, budget means I'd have to go for a 240/256GB drive. Anything smaller would mean my music production stuff (the main thing hitting the drive bottleneck), apps or OS would have to go elsewhere! Currently from my research I'm mostly thinking of a OCZ vertex 2 E (£260), or an OCZ Agility 3 (£315). The vertex 3 is just too much money. The mid-2010 MBP is 3GB/s SATA, so I wouldn't be able to take full advantage of the Agility 3 and it's 6GB/s SATA, but it should still be faster than the Vertex 2, until it hits the SATA bus limit. So, would I really notice, and is it worth the extra money for the performance of the A3, or should I save my pennies and get the V2? Any other similar or better drives I should consider? These seem about the best bang for buck here in the UK. Also, what's the formatted capacity of these 240GB drives? Are they 240GB, or will I get a horrible surprise and they come out noticeably less due to all the wear levelling stuff, or something (I'm no SSD expert!). Thanks!