My family and I will be in Phoenix next month for my daughters gymnastics competition. We've never been to a NBA game and I think we might try and watch the Suns play. Should I buy online or just walk up and grab 4 tickets outside? Do games typically sell out?, Its the game on Jan 14th against the Hawks, they kinda suck, so I wouldn't imagine tickets would be tough to grab. Any advice with regards to the arena...specifically seating?