Emotiva ERD 6.2 vs Polk Lsi7 speaker

Hi folks, I am dillema whether to go with Polk Lsi7, Lsic and LsiFx for my 5.1 setup or all Emotiva ERD 6.2 LCR and ERD-1. What do you guys think between these two brands/models? Emotiva certainly are lower in price but it has bigger driver and seems pretty decent with the silk dome tweeter. I have not really head the radiator ring tweeter that Polk is bragging on their Lsi speakers. Anyone have had the chance to audition both speakers, please share your comments here. Thanks!