yes! definitely mention the price offered by the other dealer and tell him that i won't buy unless you go lower than that. and if the dealer doesn't budge, give him your card and LEAVE. I guarantee you he will call you the next day.
also, on the ex sedan, you should be able to haggle it down way more than. i know this b/c when i was first looking to buy a car, i looked in the forte sedan ex before i got my koup sx. I was able to haggle down the sedan ex to $18,900 out the door (i swear i am not lying)! I know, the price was crazy but i refused to take it b/c i fell in love with the koup, which for some reason i hadn't noticed before.
Remember, with car negotiations, the more of the salesman's time you waste, the cheaper you will get your car!
When you said ex, i thought u were referring to the sedan for some reason. ne whoo, the above still applies. haggle with the salesman for so long that he will eventually get annoyed with you and sell u the car for dirt cheap!