Wharfdale Denton speakers are inefficient (86dB) and low power (100 W max). In other words, they shouldn't be used in a large room where you want to get a high volume level. Using those speakers with a more powerful receiver is likely to damage the speakers before you can get the sound level that you seem to want. You need to investigate more efficient speakers (sensitivity greater than 90dB) and/or ones with a greater maximum power rating (200W or more) before you invest in more powerful electronics.
Marantz SR7009/7.1.4/FH+TM/DefTech PM1000/LCR+TM amped