I have owned the GE Triton Reference and thought it was an excellent speaker for the price. I have also owned the Sopra 2 and can say it is, IMHO, way more speaker than the Triton. It's also twice the price. Kind of a "you get what you pay for" thing? If it's bass you're looking for I would suggest buying the best speaker you can find and add a quality sub to make up any bass you feel is missing.
