The 505T has been a great benchmark for me this season.  Its midlane read and consistent backend have been a life saver when I'm playing on sport or tougher conditions.  With the discontinution of all the 505 balls I'm looking  a little ahead for posible replacements.  Suggestions?  This is the only Track ball I've really liked in a long time (since the red Enforcers).  I have thought about a 715T but m a little worried about the bigger core not being as smooth.  I was also thinking a Gamebreaker, or possibly a Marvel.  Any thoughts or suggestions would be appreciated.