Here go my humble impressions after listening to them for 2-3 hours:
I was overjoyed to receive the parcel today, as already it had taken more than a month since I paid. I immediately grabbed my Fuze and started trying them out. I was slightly worried about whether or not they would fit me properly, but as it turns out they were perfect in this department, one of the best isolation I have experienced and really comfortable (Very good, tight seal). The tips that came attached with it suited me perfectly. The Bass on these is a bit less in quantity, but is tight, refined and weighty (The extended sub-bass on these is awesome). It isn't there when not required and kicks-in when the soundtrack demands. There is very less mid-bass on these. Its very easy to distinguish between 320kbps/FLAC and 128 kbps mp3 on them, I can now feel the difference in SQ (Something which I couldn't significantly notice earlier). Instruments sound simply excellent, specially guitar and drums (The 'thud' of the drums is clearly distinguishable, very neat). These have great detailing and one doesnt miss out on anything the soundtrack has to offer. The soundstage has great depth in them, but the width wasn't as much as I expected but still good (I may have expected soundstage width close to that of a full-sized headphone :ashamed

. Instruments separation is really good, and I can appreciate the instruments on a higher level now. Acoustic music really shines with these, although it handles other types of music pretty damn good too.
The Bass works for me, but I would have liked if there was a notch more of it quantity wise. I reckon Bass-heads wont find the M3 interesting. I'd also like to add that people who only listen to lossy 128kbps tracks wont notice any significant improvements in
most soundtracks as its real magic is felt with FLAC/320kbps MP3. For people who don't seem to understand why the hell a FLAC file is 30MB+, try the M3 out - You wont be disappointed.
I really like them and the more I listen to them the more I like them, its a great VFM product I must say.
P.S For some perspective - Im no audio-guru, and haven't owned any high-end IEMs in the past. As it happens, these are the most expensive IEMs I have ever bought. Im still a noob at all this.