I have four sets of the Polk Audio DB 5250's components and they sound awesome. My brother in-law has the Infinty's but I'm not sure wich model.They still sound cool. but I prefer the Polks and not just because I have them.
i've heard both their top of the line speakers...the momo and the kappa perfects...i like the kappa perfects...little bit louder with a bit more detail and clarity.