Opinions on this Receiver/Speaker Combo

[myklipschoath]

Onkyo TX-SR507 OR Maybe TX-SR307?

Polk Monitor 50's
OR
Klipsch B-3's


Hi, I'm trying to work around a $500 Dollar Budget, I fell in love with the B&W 685's but those are out of my league . Anyways, I'm trying to put together a 2.1 deal, I will be mostly listening to music, and the occasional BR movie .

I'm going to save up a bit more for the Sub. So my Question is which speaker is best for my set-up and will hold enough bass to keep ahold till I purchase a Sub? I will also love to hear any other recommendations, please enlighten a noob such as myself.


Side note: If I get the 307, I'll be able to pick up a Sub, What ya think?