I'm sending my back
Personally I think there are 2 categories. The base or the upgraded.
The base 2.3,256,8 and the upgrade 2.6,512,16. If you can't get by with the base then I'd jump up to the next tier.
I ordered and recieved a 2.6, 256, 8 and have decided to return it in favour of the 2.6,512,16. I thought if I was upgrading then I'd upgrade. Note, the only reason I didn't get 16 the day I ordered (launch day) was because I didn't realise the memory couldn't be upgraded.
If I could have got away with the 256 ssd then the base model would have been fine.
Just my 2 pennies.😱