Good luck in getting Spamalot tix..Best bet -- Call TicketMaster direct and have them do a Master Search for best seats available for number in your party. I got REALLY lucky, the tix I got were Orchestra 4th Row that had been purchased 1st day of sale and then returned more than a month later. They did NOT show up on Internet. I had a very helpful telephone rep that worked with me.
However, I can't get 4 together for Wicked in April (during school week vacation to take kids) for anything. I finally gave up (but, still have fingers crossed with some lookouts) and may shoot for show in NYC in fall. What I did do is pick up dinner theater tix instead at the Newport Playhouse and Caberet for a Friday Night. The evening should be a good time.