First of all, some of the comments here you just need to take with a grain of salt. Infinity is not a bad speaker. True they do lack midbass, and may have harsher highs, but it depends on what you are looking for. Some people like harsher, some don't. It doesn't make it a bad speaker. I would take the rev's over the infinity's as well. As for your other question, about polks, they are a very smooth and warm sounding speaker. The db's are nice, but the momo's are much better. There again it depends on what kind of sound you are looking for.