I'd say M1 is the most balanced IEMs among those u stated. Or stretch abit go for M2/M4, they are better.

Look for calmshot. He is the Brainwavz authorised reseller here.

Still new to audio stuffs and the terms but I'll try to describe my requirements as best as I can.

- My Rig: Laptop, Teclast X19HD (expecting it by Thursday/Friday)
- Type of usage: Music only, mostly used for daily commute
- File format: 320kbps MP3s, few FLACs
- Music genre: Ranges from classical to dubstep and pretty much everything in between (currently into acoustic vocal and jazz)
- Budget: Less than RM150 (tight budget)
- Headphone/ earphone type: IEM
- Other requirements (if any):

i) Neutral or balanced sound is acceptable (love details but not listening fatigue). I prefer solid, tight, punchy and good bass impact and extension (not really a basshead so a bit less than average is ok, will be using X19HD bass boost when extra juice needed), good mids and treble (better than my Superlux HD681 (eq-ed), the treble peak is killing me).

ii) Comfortable, durable, multiple eartips (first IEM, no clue about my size), good microphonics. Prefer I plug over J or L but either one is fine
Thanks in advance guys.

bit add-on fact 
in audiophile term, the first most important thing is not headphone/amp/dac/cable/ect;, its the EAR itself
human ear is unique, it can be trained to hear something small, thus making different
then it goes to recording quality/headphone/ect;

- My Rig: HTC Sensation and Laptop
- Type of usage: Musics and movies.. required a earphone that suits to everything
- File format: mp3, and video files
- Music genre: Kpop, medium bass song
- Budget:rm0-150
- Headphone/ earphone type: IEM
- Other requirements (if any): Previously used Soundmagic pl30 and it really suits me..