I'm in the process of purchasing a new Mac. I've been on PCs since 1994, Macs before that and yes I know a lot has changed since I was on AUX. First, I am planning on buying a new G5 Mac. I am waiting for the Rev.B machines to come out (hoping for dual 3.0 Ghz). In the mean time I have access to a PowerMac G4 tower. 1 - Will the memory used in a G4 work in a G5? I will have to add memory to the old G4 and I would like to be able to repurpose this in the G5 when they become available. 2 - I assume the G4 can run OSX - Yes? 3 - I have 2 Mac Cinema 23" displays. Will the G4 support the Mac Cinema 23" HD Display? WIll it support dual displays? WHat adaptor is needed to support the second display and will this adaptor transfer to the G5? 4 - If I would like to support a video tuner/DVCR option on the G5 to watch/record video who makes a tuner/capture card that fits and has proper drivers for OSX and a G5? TIA Al H.