Have you tried peq /autoeq on the qudelix?
A better dac is not going to help bass. You need high output power and low impedance. Try to get an e1da 9038. Bass demands power. If drain is a concern for you, and you don't want to carry a separate battery powered dac i would say just give up.
None of these iem's you've listed are going to solve your problem. Imho your need seems to be that you need to buy some new iems and need to rationalize your purchase
