Yes, it will be a huge improvement over your Sony. The Emotiva amp will leave the Sony in the dust as the Emotiva is rated at 80 wpc ALL CHANNELS DRIVEN. Thats a big difference between the way Sony rates its output into two Channels at 100w + 100w. Typical AVR marketing BS. I am not even sure what this means - Does this mean 100 watts into 2 channels SIMULTANEOUSLY or does this mean 100 watts into any one channel only when in 2 channel mode? I tend to think the latter.
Either way the Emotiva will give an honest 80 wpc into 5 channels SIMULTANEOUSLY. So your not losing by ditching the Sony - your actually gaining a lot of real amp power.
Marantz PM15S2 LE, Oppo BDP-103, Simaudio Moon 100D DAC
VPI Traveler V2 with an Ortofon Rondo Blue and Simaudio Moon 110LP, Technics SL-1400 with an Audio Technica AT-14sa and Pro-ject Phono Box S
Dynaudio Focus 260's, Rel T-1 and a Panasonic TC-P54S1.