sepharadi tefillin

Question

k'vod ha Rav: I am an Ashkenaz that started in teshuva around 20 years ago and I have been praying and learning w/ Sepharadim ever since. My wife is a sepharadit, and our home is run accordingly. I've always had Ashkenaz tefillin (beit yosef/ however, wrapped sepharadic minhag). Seperately, I also recently learned (from Rav Eli Mansour) about the incredible importance of wearing the tefillin properly, etc. I was told recently that considering all of the above, I should finally purchase Sepharadic teffillin. I am happy to spend the $ to beautify the miztvah (w/ a competant sofer). My question is, is there a basis to this person's assertion that I need to have the new tefillin? Would you be so kind as to give me a source if there is a basis?