AFTER BEING ASSIGNED RWY 1L UNEXPECTEDLY; AN A320 CAPT IDENTS THE WRONG ARPT DURING A VISUAL APCH TO LAS RESULTING IN DIFFICULTY BECOMING STABILIZED AT COMPANY MANDATED ALT ONCE THE CORRECT RWY WAS IN SIGHT.

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ATIS RPTED LAS LNDG RWY 19R&L AND RWY 7R. WE BRIEFED A LNDG RWY 19L. THERE WERE SCATTERED TSTMS IN THE AREA. THE ARPT WAS VFR WITH VISIBILITY 10+ MI. APCH GAVE US A SOUTHERLY HDG AND ADVISED US WE WERE LNDG RWY 1L. SINCE WE WERE COMING FROM E; THEY HAD US ON A R DOWNWIND FOR RWY 1L. APCH ASSIGNED US 7000 FT. WE HEARD A RADIO XMISSION ASSIGNING US 6100 FT IN A DIFFERENT VOICE. WE DID NOT LEAVE 7000 FT AND ASKED FOR A CLARIFICATION OF ALT. THE NORMAL CTLR VOICE SAID TO MAINTAIN 7000 FT AND ASKED FOR A CLARIFICATION OF ALT. THE NORMAL CTLR VOICE SAID TO MAINTAIN 7000 FT AND WE WERE THEN GIVEN A R TURN FOR BASE. I FELT WE HAD FLOWED SIGNIFICANTLY S AND SHOULD HAVE A GOOD FINAL. APCH ASKED IF WE HAD THE TFC OR ARPT IN SIGHT. I WAS FLYING AND I DID NOT HAVE THE FIELD IN SIGHT. THE FO (PNF) ADVISED ME HE HAD THE FIELD IN SIGHT. I TOLD HIM TO RPT THE FIELD IN SIGHT. WE WERE THEN CLRED FOR A VISUAL APCH. AS I TURNED ON FINAL; I REQUESTED THAT WE LOWER THE GEAR AND REQUESTED FLAPS 1 DEG. I HAD LINED UP WITH A RWY USING THE NAV DISPLAY. I SAW A RWY LIGHT SYS AHEAD BUT NO VASI SYS. I WAS LOOKING AT A RWY OR HWY MUCH FURTHER AWAY THAT WAS LINED UP WITH THE NAV DISPLAY. THE FO SUGGESTED WE WERE VERY HIGH. I THEN SAW THE REAL RWY AND I REQUESTED FLAPS 2 DEGS AT 190 KTS. I THEN ADJUSTED THE PITCH TO TRY TO GET DOWN AND LET THE SPD BUILD TO APPROX 7 KTS OVERSPD. I SCREWED UP. I SHOULD HAVE DONE A GAR; BUT I WAS ABLE TO GET RID OF THE EXTRA ENERGY AND BE STABILIZED BY 500 FT. THE LNDG WAS NORMAL. THE OVERSPD WAS EMBARRASSING. AGGRESSIVE S-TURNS AND SPD BRAKE USAGE WAS REQUIRED TO GET STABILIZED BY 500 FT AGL AND HAVE A NORMAL TOUCHDOWN. THE FO AND I NEVER SAW THE PAPI LIGHTS OR REIL LIGHTS LISTED ON THE LAS PAGE OR RWY 1L.