I'm glad you opened this thread, I've been listening to Bangladeshi rock/metal a lot lately, including the ones you posted above. I don't like Bangla or any pop music though, so I'll pass on Habib.
Some bands I like-
Kral -
http://www.myspace.com/kralbd
Cryptic Fate -
http://www.myspace.com/cfate (Download album:
Danob)
Black -
http://www.myspace.com/black1193
Dark (compilation with other bands) -
http://www.myspace.com/bdbandz
Also others like Shade, Fulbanu's Revenge, Icons, etc.
I don't like crappy slow, pop-rock bands with crappy lovey-dovey singing. If you know more proper rock/metal bands from Bangladesh, please post them here.