Shopping

I need earphone and mouse and external harddisk.
I want Creative earphone cause I used for more than 5 years already.
Here the models, EP550, EP510, HQ80, HQ140.
I used Dtech mouse as free accessory for 2.5 years, quite worth it.
Now I saw Logitech wireless mice, and I do not know how to choose.

And the EP550 is about RM69, that I saw online.
EP510 costs RM50.
While HQ140 is RM89, what's the difference??
Because of the hook???
Since what I used now is something alike HQ65, which costs RM39.
Hmmm, what should I choose???

Wireless Mouse
Logitech M325 purple costs RM76
Logitech M235 red costs RM56
Logitech M187 red costs RM49.

Now data storage 500GB costs about RM230.

I want a MP3 too, to listen to music and Shifu's voice always.