Code Quality Vs Time To Market

It is one of the most viciously debated question in the software industry. Do I spend more time on the quality of code or should I just release the working code with some defects to beat the competitors. Both have its pros and cons. But the thing to remember is that there is no "perfect product" or "defect free product" which exists today. So do I keep reviewing the code inorder to reduce the time on fixing the bugs or release the code and fix the bugs later to beat the competition?
Having been in the software industry for quite some time, here is my take on this. There two kinds of companies working on softwares Product companies and Services companies. Product companies generate revenue by timely releases of their product to beat competitors. Although quality is important to them but it is not so important that they can spend months/years together to imrove the quality and there by lose their market share. Their strategy is to release the first/alpha version of the product and then fix the bugs based on customer experience. Services companies tend to rely a lot on the code quality as it is their measure of experience. Services company make revenues by servicing the clients and their profit is usually governed by how efficiently they can deliver the product thereby reducing the support/warranty time. This can only be achieved by making sure that the code passes all the acceptance criteria and has undergone several rounds of tests. To make sure that the above goes well, mainitaining the code quality becomes important.
If you have any thoughts on this please feel free to share the same.