I recently purchased a Marantz HD-AMP1 to pair with my Super 3i's and like the pairing quite a lot. Not exactly a replacement for my little Zen amp, which I love, more of an alternative. It's a lower-powered (35 WPC) class d integrated with an onboard Sabre DAC. This caught my eye a couple of years ago when it was released but I had no need at the time. I looked at several integrated amps around the same price but the HD-AMP1 had every option I was looking for, so I took a chance. Glad I did.