I'm planning on buying the hex core, D500 model. I think this is the sweet spot in price/performance. For disk I have all my large data files off on a NAS and the 245GB is fine, but for RAM I'd like 32 GB. Traditionally I buy aftermarket RAM and upgrade myself, but here that would entail throwing out or turning in four good sticks. So I'm considering paying an Apple tax and just BTO to 32GB, it might be cheaper than paying for then getting rid of the 16GB. Looking here http://www.newegg.com/Product/Produ...ESTMATCH&Description=ecc+1866&N=-1&isNodeId=1 Indicates that an 8GB ECC 1866 stick would cost around $150 - so $600 for after market 32GB. Any wagers on what a BTO from 16GB to 32GB would cost?