I haven't used the HD3000, but have used one of its predecessors (4618??). I have a 7318, which is fine for what it is. Both are going to be good solid mechanical machines with no frills (like needle up/down). The HD3000 has a needle threader and compartments to store the feet. The 7318 only has a slide out tray. I think the HD3000 comes with a few more feet too. For me, the HD3000 would slightly edge out the 7318, but I think the 7318 is prettier (whatever that's worth <g>).