Mark

Klipsh is a good choice - some people either love or hate a lot of horn designs - I liked the newer Klipsh ref series but not to all tastes (what is?).

They are geenrally more dynamic and easier to drive than a lot of the competition - horns typically have a smaller sweetspot - but not as small as many seem to imply(suppose the way you position and where you sit will have an impact.

Another option to try is Athena Technologies. Sold at Future Shop is a downside but on the flip side they manage to sound pretty good in those poor rooms with receivers - at prices significanly lower than Polk you might be surprised at how they compare.