As a counter to PP's admission of bias, I also have to admit my own bias towards NAD amplification. I've always been a fan and I generally feel their amps compete well above their price point.
Ultimately I think the best thing would be for you to live with the Epos speakers being driven by the NAD for a while. You can see how that goes and, if you feel you need something more, it would then be worth auditioning the Creek as well as other options. I think any amp consideration should include more expensive amps such as the 5350 and Destiny, and something like the Roksan Caspian, as well as the Creek Evo and something like the Audiolab 8200A.