I've heard that typically the high end models give less bang for the buck. I am trying to decide between the 2.66 Quad or the 2.26 Octad. I don't think I need the processing power of the Octad but like the 8 slots of memory versus 4 in the Quad and also it's "only" $700 more. Perhaps the 2.26 is more future proof? If I need the power of the 2.26 in the future would it be better to just buy it now, or sell the 2.66 Quad and buy a new MP which by then would even be better? Anyway, as it stands now which do you think is the better value (bang for buck)? Thanks!