64GB should be enough if you manage storage properly, you most probably will need external storage for media. Fresh install of ML takes up ~ 13GB
I have a 64gb air. I had a macbook pro with a 64gb ssd for almost 2 years and can't remember having less than 20gb available at any point in time. I don't have music or films in it. I keep only essential files. Everything else goes in the bin.
Gustavos-MacBook-Air:~ gustavo$ df -h
Filesystem Size Used Avail Capacity iused ifree %iused Mounted on
/dev/disk0s2 56Gi 20Gi 35Gi 37% 5398097 9203135 37% /
2012 macbook air with all my stuff on it (mainly text files). It has pages, keynote, and office 2011 installed.
Gustavo, thanks for your reply with facts. Could I please request you to run activity monitor on your 2012 air and let us know the free memory when you load up safari and office 2011.
On a diff note, I have had both linux and macs with 32GB SSD and I had all my music on an external drive (days when SSD were way mor eexpensive) but Snow leopard seemed to consume much less memory than Lion (havent tried ML)
Bought a MBP for basic eclipse based java and xcode based ios development (all other work gets done on an Ubuntu server). Wont store photos/music.
Is the 64GB SSD enough (how much does ML and the recovery partition need)?