60D worth it over 550D or 600D?

650D & 60D Specs (I'm happy with my 60D)

• Processor = 650D: Digic 5 and 60D: Digic 4
• Viewfinder = 650D: Eye-level pentamirror and 60D: pentaprism (solid chunk of glass).
• Magnification = 650D: 0.85x and 60D: 0.95x
• Shutter speed = 650D: 30 thru 1/4000 sec. and 60D: 30 thru 1/8000.
• Eye-sensor to toggle LCD screen on and off = 650D: Yes and 60D: No.
• Horizontal electronic level = 650D: No and 60D: Yes.
• Battery life = 650D: 450 shots and 60D: 600 shots.
  
• Weight (inc. batteries) =  650D: 575 g (1.27 lb) and 60D:  = 755 g (1.6 lb).
• Dimensions:
• 650D = 133 x 100 x 79 mm (5.24 x 3.94 x 3.11 in)
• 60D   = 145 x 106 x 79 mm (5.7 x 4.2 x 3.1 in)

And the winner for you is your smart choice.