After researching forums, and done many testing, i finally bought my DT770 pro headphone from below website at S$230. Plugged into my $79 battery powered Xenos head amp & the bass really roars.
The bass is really impressive, strong and well defined. The mids & highs also very clear & good separations. I have tested many models & brands which is supposed to have good bass, but this one beats them all.
Bought from local shop here -->
http://broadcastsupply.com.sg/beyerdynamic-dt770pro.html
The frequency response chart showed how strong the bass is -->
http://www.headphone.com/products/headphon...amic-dt-770.php
After listening with it, i regret not using 192KB bit rate when i converted my entire CD collections to MP3. My old creative in-ear headphone did not make any difference with my 128kb recordings, but this beyerdynamics really shows all the flaws in the sound quality.