Polk's subs blow
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, but you get a discount....(they still blow though).
The only problem with most forums dedicated to a specific brand is most of those guys are fanatic fan boi tweakers and it will be HIGHLY unlikely that you will hear negative things about the product. That is not to say they are or aren't a good product, but it isn't the BEST place to get info on the product.
I've owned the LSi7s. They're decent, but at MSRP, they are way overpriced for their performance. Build quality is excellent on them though.