Problem is, I have 4gb at the moment and it is way too little for my needs. Also, while I would love to keep the laptop for as many years as I can, I feel the next version will be significantly better.If you're not sure then 8GB is probably okay. The SSD on these are quite fast, read speeds >2GB and write ~1.5GB, so paging will be that much quicker if it does happen. That said, if I were to keep the machine for more than a couple years I'd go to 16 on the RAM, but most won't need it.
Argh, I'm thinking and comparing too much, and I don't like to think this much about a perishable piece of technology.