I am looking to get a 13" rMPB.. has to be the 13" because of the size. I'm a pro photographer and also do some video but mainly will be used for editing images in the field. With video I won't be doing much - but could be simple edits in prep for work on my main mac at base. I can get from stock at the Apple stores, the 2.8i7/512SSD and 8gb Ram - but I am wondering how much I'll miss out on the extra memory of 16Gb. If i add the memory I have to do a BTO and besides a few weeks wait - It's a PITA if I need to exchange it. Picking up in the store is way easier. Will 16 be overkill in the 13" - would it even be used? I'm wondering why they're not offering the top spec model in store with the 1tb SSD (which I don't need but would buy for convenience) 16Gb RAM and the 2.8i7. So it's almost what I want but I am wondering on if I should be resolute about the 16Gb RAM - or just walk into the store and buy one.