I've got a late 2007 MBP - 2.4MHz core 2 duo - 2 gig RAM and lots of disk space. My performance with snow leopard is really frustrating with lots of spinning beach balls when simply switching from Mail to Safari or an open mail message or anything. I've fixed permissions etc but it's still slow and this is not new. Is Lion more efficient and likely to smooth my performance or does it just require more resources and will make things worse? Thanks!