The XBA series are really good for the money.

The XBA-1s BA driver is quite decent in covering alot of the frequencies, and the XBA-2 is a breath of fresh air in the dual BA world thats now filled with TWFK drivers that are rather dry and bass-shy.

The XBA-4s I've used for awhile and sold it. Top end stuff. Very Ultrasone-like sound. Big powerful bass with stoic mids/vocals and sparkly, metallic tinged highs. Good for EDM music, or just about any other genres. Just.. yeah.. very big housing. The XBA-4SL has an annoying J cord which can be annoying. The iP version has the normal Y cords.

Also, the XBA series seems to have dropped its price, with Amazon US selling them for 220USD brand new. Which is what? 700ringgit?? MADNESS

Have you got the fit right on the XBA-4s???

I've owned the XBA-4 for about 5 weeks. They sounded alright down low, very full, deep and full of power. Extension is great.. Side by side, the TF10's bass hits harder and faster, but the XBA exhibits a more cultured bass response. I got the J cord one however, and couldn't live with that. The treble of the XBA-4s are the only thing I didn't like. Too metallic tinged.