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Hi, I need some help and/or advice.

Got a iPhone 3G for Xmas and the supplied phones don't stay in my ear and sound poor.

I need a nice sound set in ear buds but It must have a Big BASS more than anything else. Plus the mic must be very slim like apple's own.

I've bought and brought back:

Sennheiser MM50 (sound was ok, light Bass) but the Mic was way to big and caught my collar all the time, which pulled the ear piece out. They went back.

Then

Bought the new Apple in earphones. The style and quality of these were great, but the bass was terrible. They went back to the apple store on Wednesday.

Can anyone suggest a set of in earphones for iphone which has good allround sonic abilty with heavy Bass + a slim inline mic.

Budget upto £90.

Thanks