[3six5]

I bought the MS400s after reading a lot of reviews saying they have great bass.  Well to me they don't.  I recently bought the Sony XB500s which do have more bass but I would want even more bass.  I am looking for a new pair that will at least come near the XB500s in bass and still have good mids, highs.  I was looking into the Beyer Dt770 Pros.  Any other suggestions? I don't mind if they are not portable but I thought I would post this here since the MS400s are considered portable.
 
Also this is my first post/thread  
 
Lastly I want to sell/trade my MS400s which I will post a classified for in the sell/trade forum.  For some reason it wouldn't let me do it earlier, maybe because I am a noob? I don't know.