I think the Andrew Jones designed Elac speakers are great but I had the DBR62 for a bit and my former amplifier (Marantz m-cr603) was far too weedy for them. The thing is before upgrading the amplifier, I bought different speakers, my Triangle Titus EZ, and these sounded great with the Marantz but they also sewed an upgrade itch in me to get a better amp. I upgraded my amp to the Denon pma 800ne and for a time I had both the Triangles and the DBR62. The fact was that the Triangles had taught me to appreciate a very different sound to the Elacs and they sounded so good with the Denon that I knew I would end up selling the Elacs. I did try the debut reference with the Denon before I sold them, and they sounded fine but still not really "alive" to my ears and I much preferred the new livelier sound I had grown to love with the Titus EZ.
So maybe not a very helpful answer to your question, but my take is that the DBR62 need a lot of power to really sound their best, maybe 80 watts plus and an amp capable of delivering high current.