Eric,
My advise would be for the time being, stick to using the Bronica SQ-Ai (it's a fine camera) and really use it a lot. Eventually you will know if it suits your needs or if you feel like you are missing something: a different format; studio vs available light work; SLR vs TLR vs RF. After using the Bronica for a while you will know.
For now, enjoy learning with your Bronica.
gene