Am the only one still playing Civ III?

I'm waiting for Civ V to go on sale before I pick it up for my semi-new gaming rig. Is it worth trying out Civ IV too?
If you're really into Civ III, it's possible IV won't be that enticing (an odd love-it-or-hate-it trend I've noticed.) I'd still try out Civ IV all the same, but then again I found Civ III a bit meh - a stepping stone to IV, but not a patch on Civ II - so your mileage may vary. Just don't judge Civ IV without the Beyond the Sword expansion, it's a must-have.