Well my brother has one connected directly to his 2012 iMac 27" and with Q Acousitc 2020i's and it's a fantastic amp!
I'm seriously considering getting one myself to power some small speakers for my new office desk but cost is holding me back currently (because I'm being a bit tight fisted not because I'm skint haha )
I'm biased towards NAD as I've had their amps since I was about 14 (so 21 years now) and always loved their sound. Currently using a NAD C320BEE to power some AE100i's on my desk but it's a tank of an amp and I want to downsize but will also be considering powered speakers too (Ruark, Audioengine and EPOZ)
The D3020 has bags of power and my brothers 2020i's sound stunning. They're on his desk but it's a solid piece of furniture and he's used a 4cm thick piece of slate he's cut into two to dampen the speakers (blu-tac'd the slate to the desk and then blu-tac'd the speakers to the slate) and there's very little resonance at all until you turn it up too loud!
I'm assuming you'll be using speaker stands for your speakers?