Both amps would indeed serve you well. Although the 2100 is a fine amp, you are also paying a huge premium for the name as well. Mac components always fetch higher premiums than similiarly performing components, including the Macs from an era when they were sold at Radio Shack.
Since you are considering both the Mac and the Heathkit, it would seem that your primary concern is centered soley around sound quality and a direct comparison by yourself would ensure you make the correct choice.
I always find these comments funny. The name the name. Please tell me what gave McIntosh the Name?
