Look, we all have different ideas on what is "best". The thing is - what will be "best" for Cessium?
It all depends on what he wants to shoot. If he wants "to be ready for anything" then go with a lens that has a wider range. Shooting mostly daytime then don't worry so much about the F stop. Don't like bulky, then go with one of the newer compact lenses (The 28-300 Sigma folds up to like 4" and 4oz). It all depends on what Cessium wants to shoot and what his needs are (not all of our varied idiosyncrasies).
Cessium, take everything posted for what its worth but only you know for sure which ideas fit your needs best.
(Yes, I am ranting this morning.)