Tix4 tonight, they have kiosks around the strip and they will give you a discount and front line priority I believe if you go back for more tickets to something else the next day
For your best selection of seats and discount pricing I have found Tix 4 Tonight kiosks to be consistently the best. There are about 10 of them located up and down the strip enjoy the show any seatis a great seat it's a small theater.
If you try Las Vegas com they very often have specials, or seat upgrades.
Get quick answers from Terry Fator - The Voice of Entertainment staff and past visitors.