I just emailed Polk CS because of a cracked port on the back of one of my RTi-10's. I had a response in (literally) less than 10 minutes, and even after admitting that I bought them open box at Crutchfield, Ken offered to send the part out free of charge.
In a world of ever declining customer service, kudos to Polk for still "doing things right." I offered twice to pay for it, but Ken said it would be shipped out free of charge.
When the rti's become "man room toys", I'll definitely be purchasing some LSi's for the living room.
Polk has my complete allegiance now. Again, excellent job!!