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Hi, as you can see in the title I was trying to decide between the:
 
Sennheiser CX 300-II
Sony EX Earbuds (MDREX500LP)
Klipsch Ear-bud  (IMAGE S5I)
Bose MIE2I
and maybe the Sennheiser/Adidas Headset (CX680I)
 
Any experience you have with these earbuds would be very helpful, the reason I'm buying new earbuds is because my Sennheiser cx 400 II died on me 

.
 
Thanks in advance for any help.