water supply

I'm going to buy my water supply bulkhead and was wondering if I should get the gravit fill and the city water fill type or just gravity fill.
Very basic system, gravity fill for tank, tank to pump and pump to faucet. I could get fancy and add a city line to feed the faucet as well but not really sure its needed and its one more source of leaks. If I added the city line I would just run it directly to the hot fitting on the faucet so it would be pretty simple too I guess.
This is for a basic tear drop with no bathroom or shower.
Thanks for your opinions
David
Very basic system, gravity fill for tank, tank to pump and pump to faucet. I could get fancy and add a city line to feed the faucet as well but not really sure its needed and its one more source of leaks. If I added the city line I would just run it directly to the hot fitting on the faucet so it would be pretty simple too I guess.
This is for a basic tear drop with no bathroom or shower.
Thanks for your opinions
David