B&H is offering the 256GB MBP at $2,199 right now. Was going to wait for the 512GB to come in stock but at $400 less I'm thinking of pulling the trigger and just keeping a 500GB external SSD (which I can get for under 200). I understand the external will be slower but for the most part I think I can fit all my active projects on the 256GB and use the external mainly for storage and samples I don't use too often (I'm a music producer). Or should I wait for the 512 still? Is an extra 256GB internally really worth $400? What would you do?