In case you miss it, I already included it on the review.

X3i has been discontinued for a few months now, replaced by the Bijou series.

Bijou3 has a lot of bass. IIRC, it is more bassy than X3i - and perhaps too bassy for its own good. Though I haven't heard Bijou2, I read that it has a more controlled and refined bass. You might want to pay attention to it as well. As for build quality, it has been improved vastly and pretty solid now. You do need to burn it in for at least 50 hrs.

The estimated price is close to (and maybe even over) RM1500, I am not that rich to get one

Not any time soon since my bank account is currently close to empty.

Yes, I amped RE1 with XM3 during the review. It was my main portable amp for almost two years. If you have read it, here is my review on RE0, the current best of Head-Direct's offering.

I am currently back home at Paloh, a small town in the middle of Johor.

Haha, no worry lah. I am not sure I want you to risk your RM1500 investment too. I can probably audition it at Jaben if I visit Singapore.

I did.

I already added the info into the original thread on Head-fi, but forgot to change it here. Will update when I am more free.

BTW, icyfawkes, thanks for the offer, but it is not as easy as I'll like it to be (see PM) thus I can't accept your generosity. I am sure I'll be sorry for this. In any case, I want to thank you again for the kindness.

You can get one directly from Head-Direct.com, currently listed US$79.

All shipping for headphone is free since two months ago, IIRC. Head-Direct is a Head-fi.org sponsor and I know the owner (Nankai @ Head-fi) quite well even though I never met him personally. In fact, I just recently bought a set of filter from him and it is currently on route to me, not to mention I received RE0 about a month ago. His website might be a bit outdated but the service is good.

I can't review what I don't own...

Sorry mate, like Proclaimer said, I am living in a remote corner of Johor and unless you are near by, I am not sure how you are going to try them out.

...I am not really famous lah...

No, you need to accumulate 50hrs of usage totally. Continuity is not important.

Already did that quite some time ago

I thought ER4P is more than RM500 already? You won't find anything better than ER4P for your budget. IMO, the best recommendation I can give in that price range are either Phonak Audeo or FutureSonics Atrio M5 (both excluding shipping, etc). However, I doubt they will be upgrade, more like sidestepping.

SF3 is about the same level as ER6i, but with less detail and warmer, bassier, more versatile/adaptive sound signature. By itself, SF3 is quite a good choice as entry level IEM. But it will still come short in comparison of ER4P. If you get SF3, it will sound quite different from ER4P, but don't expect it to be an upgrade. Personally, I'll invest my money toward a good portable amp to better drive the ER4.

Not just 'some said', but it isn't just 'rebadge' either.

Foster is one of the world largest OEM. Among some of the things they make are headphones (and a lot of other audio equipments). They customers includes (for what I know) Sony, Audio-Technica, Bang & Olufsen, Sharp, Panasonic, Apple (as in iBud), Sennheiser, Denon, AKG... the list goes on. Foster will customize any of their headphone to suit customer's need, and EP630 and CX300 are one of those case. So although they both look the same, they don't sound alike - because Creative and Sennheiser have requested Foster to tune the IEM to their own specification. In fact, if you have enough money to spend, Foster will custom make your own brand of headphone and ship them to you.

For my own preference, I will take KSC75 over PL30 and definitely over EP-630. The problem with PL30 is I can't get a good seal for long enough time, thus it becomes pretty useless for me as portable 'phone. In fact, I'll rather settle with the lesser PL20 or PL11 as both fit much better in my ears. I don't use clip-on much these days so I have no interest on reviewing KSC75. Plus, it has been around for way too long so you can easily find tons of review via google.

None in this review.

If you are using iPhone, then there is the NuForce NE-7M.

I only heard PL11 and PL20 before, can't help you on the other. For review of PL11 / PL20, read thisthis.