I am going with Boston Acoustics Pro60's. I am going to try and install them this week. They will definitely be run by an external amp though. If you want better sound, I don't think you'll get what you are after unless you hook them up to an amp. If you are going to put a sub in, just get a 4 channel amp and run the front two channels on the amp and bridge the rear 2 for the sub.
Where in TN are you? I used to be a professionally installer and could help if you needed it.