Hi there. The Denon 1913 is a very capable receiver. Everyone will have a little bit different preference for receivers. I think the Yamaha RX-V673 has similar capabilities, and in that same price range. I have had worked with a few different receivers from Yamaha, Denon, Pioneer, Sony, and Onkyo. I think Yamaha receivers tend to be the most user-friendly.
As far as speakers go, it's better if you can actually listen to them. Again, everyone likes a little bit different sound. Polk Audio and Pioneer make some decent speakers, and are reasonably affordable. Check out the Polk Blackstone TL1600, for a complete 5.1 set.