The pioneer bookshelf speakers the old version and new version are very often on sale, they are considered the best budget speakers. You can get a pair for under $100 dollars .
This speakers are getting a lot of attention here.
SP-BS21-LR old version and new version SP-BS22-LR
You can get 4 speakers for less than $200 then if you think the denon is over you budget ,you can look at Acessories4less.com for a less expensive receivers.
Living Room :Oled 65" B6 / Marantz SR7010 / Xbox One S / PS4 Pro / HTPC / 2 PSA XS30 / Revel Performa3 F206 / Revel Performa3 C205 / Revel Surrounds / Sonos Connect / Roku 4 Ultra /Amazon Fire tv /