Apart from Lamy Safari, another option is the Pilot Metropolitan. If you want smooth writing, get a Medium or larger. Pilot Medium's are the equivalent of Fine in most countries.
I have a fine Pilot Metropolitan and went looking for a Medium tip to try it out. Unfortunately, they don't sell the tips separately, but I did find a list of Pilot pens which are said to have compatible tips: Plumix, Pluminix, Prera, Penmanship, 78G, Kakuna.
It looks the Plumix is $10, which seems steep for the tip, but I guess it's better than paying another $20-ish for a second Metropolitan.
On another note, I came across the Platinum Curidas pen. It's a clicky fountain pen! I'm very tempted to buy one, but I've never spent anywhere near $80 on a pen before.
Check out the Pilot Vanishing Point. Fantastic pen, also click-style and with a reasonably good seal while disengaged. I've been using mine as a daily writer for the better part of a decade. Unfortunately the price has crept up in recent years.
On another note, I came across the Platinum Curidas pen. It's a clicky fountain pen! I'm very tempted to buy one, but I've never spent anywhere near $80 on a pen before.