My scenario - I have three intel core 2 duo imacs, one 17" blonde, one 20" blonde, and an aluminum. They all run just fine, thank you, in SL. The two older 'blonde' imacs have 2 gigs of ram; the aluminum 2 1/2 gigs. If I buy a 4 gig ram kit from macsales, for about $63, I can make all three imacs have 3 gigs of ram. Will my imacs be able to run Lion OK (without it bogging down)? I KNOW what the minimum system requirements are, 2 gigs of ram and a core 2 duo.