I'm getting an iMac (MB950LL, mid-2011 model, I believe) for the first time, after having my G4 MDD since 2003 (under Mac OS 10.4). As a new iMac user and I have never use 10.5 or 10.6 before, what am I anticipating from this new system (beside faster speed and the likes)? I would appreciate the pros and cons from any of you who has/had a similar system. My primary reason is that Mac OS 10.7 does not support any PowerPC apps and I'm not ready to upgrade my PPC apps yet. I use my current Mac for Internet browsing, 3D, photo-editing, illustration, and desktop publication contents. Thank you for any feedback.