Ok I think I've narrowed my decision down to these two which I can get for similar prices. Which one would you guys recommend for just pure sound and surround sound quality?
Roughly, or a bit more. Those are pretty good prices. I would go for the H/K though, Entry level Marantz receivers will not sound as good as an entry level H/K in my opinion. Plus if your pairing it with Polk speakers then H/K is a must. Polk speakers tend to me a bit on the bright side and the dark sound of the H/K's seem to tame that quit a bit.
That's the top model below the 7000 series flagship. The 400 and 600 series share the same chipset, but the 600 has the most power. Good price even for B stock, as long as it doesn't die it's a good deal