Hi Matt,
I could tell you what I think you should get,... but it would be a biased opinion, and you may not even like what I'd suggest,....I doubt it though, who doesn't like RBH stuff.
Onkyo's been on a roll lately and has some excellent recievers. I agree you will want pre-outs, weather you think you need them or not
As for the Polk's, if you like the way they sound,... get 'em. Most people who buy them really like them.
I think you have picked out a fine system,.... oh yeah, as Tony said "SVS is a great option" especially for subs, but I hear their new speakers are very nice too.
Amps,... expensive???
, yeah, this whole hobby is like that
If you don't like the looks of some stuff, there is plenty to choose from. Some of it though