For average use you won't see much of a need for anything over 4GB, at least nowadays. Even running a VM with that much (so long as you're not really running much else) works just fine with 4GB.
That being said, it's easy as heck to upgrade and RAM is dirt cheap so throw an extra 4 or 8GB of after-market RAM in after buying and you'll be solid for the next couple of years.
That being said, it's easy as heck to upgrade and RAM is dirt cheap so throw an extra 4 or 8GB of after-market RAM in after buying and you'll be solid for the next couple of years.