I just ordered the mid2012 uMBP or 'classic' with 8GB RAM. is this enough for architectural renderings with artlantis, archicad, sketchup in blazing speed? Anyhow, in the future, if i want to upgrade to 16GB Ram, is that possible? I heard the prev version could not.. Also, do i need to get a MAC ram? Or any brand for PCs could do? Whats the ram details? Sorry, im new to macs.