Thanks Colbyt and J Burns.

So, what are some good models available today at a Big Box store like
Lowes or Home Depot? I'd be fine using my Troybilt with just the
blower, edger, and tiller/cultivator attachments I already own. This
is for home and not commercial use. Should I be looking at a
commercial-grade model? If so, what model, where, and what should I
expect to pay? Surely those who landscape for a living aren't using a
model like mine--at least I hope not.