Can't help with tix4tonite but I seem to remember that Phantom may have been available when I was there in June. A couple of suggestions. Phantom is superb and has deals on www.travelzoo.com. 'O' has 25% off on www.cirquedusoleil.com, you need to register first. Discounts for 'O' are up until end of July. If you decide on 'O' then try to sit further away as it is far more spectacular (similar situation with Phantom IMO). You won't go wrong with either of them.