To follow up on my previous post, I have a question. Head-Case has [has a lot|is mostly made up] of Mac users. Many of you have older machines still in use. I'm curious about your experiences running Lion on an older model Mac. My main concern is not legacy app compatibility, but overall system performance. This machine is limited to 4GB of RAM, and has a 2.4GHz Core 2 Duo CPU. It also has a horrific Intel graphics chipset with shared RAM. The new SDD makes load times super speedy, but there is not a lot of horsepower in this machine by today's standards.
At any given time, I run FFX (say, 10 tabs), and one of the following: Chrome (1-2 tabs, but often playing a YouTube video which gobbles up CPU cycles), Photoshop CS5 (bloated pig), Traktor (DJ software, efficient, but fairly hungry). I also run a bunch of small footprint apps: Transmission (torrent client), Twitter, Adium, Mail, etc.
To be honest, the main reason I'm considering upgrading to Lion is so I can use $%#&* 1Password. Also, 10.6.8 is kind of long in the tooth these days.