Primare sounds great with Sonus. (I use Primare separates with the EAII.) Most would say that Sonus speakers lean towards the 'warm' side; I wouldn't pair Sonus with a warm/soft amp. However, I wouldn't trust others to tell you what is 'right'. Audition whatever you can to make the most informed decision. A good speaker can sound good with almost any amp. A good speaker with a good amp = something special.
That's my two cents.
That's my two cents.