Introduction from the USA

Hi, i'm new to this forum. There's some great info to be gotten in here. I'm looking for a opinion, I am closing on my new house at the end of Jan. So i;m building my new Home Theater. here it is>
TV+ 65" aspect, made by Hitachi
Surge protection= HKS3600mkIII monster cable power center
Receiver= AVS635 Harmon Kardon
DVD player= Sony 400 Disc DVP-CX985V
Center Channel= Polk CiS5
Rear= Polk monitor50
Front= I havn't purchased yet {maybe Polk RTi8? or
mon50's}
Subwoofer= 15" Cerwin Vega 400 watt

I have Probably saved over a 1000 dollars by buying on ebay.
Does anyone have and suggestions on my front speaker options?
O-yea, my room size is 20x20 foot w/16 foot ceiling

Thank you in advance to any feed back, Ken