Hi all :) I have a nexus s with voodoo and i love the sound,but the lack of expansion is a turn off .Is there a dedicated dap out there with the same sound signature? (warm,bassy). (please,no samsung galaxy s III or note 2 because i'm not a real fan of them.) also,micro sd is a must and...

I'm looking to get a new (used, I don't have a contract) phone, obviously SQ is important to me.  Which phones have good audio that can be bought used for a decent amount.  I'd like to keep it ~200 but I would be willing to stretch that if it's worth it (i.e. current generation smartphone).  ...