The Ultra 2's are soo powerful, the ultra pws original is really the best stick for a player with classic tennis strokes. Check out the diffs between the 3 diff versions of the Ultra rackets. There were some other ultra models, but these are the 3 main variants:
http://www.woodtennis.com/sampras/ultra3racs.jpg
http://www.woodtennis.com/sampras/ultraThroats.jpg
http://www.woodtennis.com/sampras/ultraSides.jpg