After being all over the board on keeping or replacing my anemic DC, buying new made the most sense if the garage is going to ever function as a year-round workshop.
Reasons I went with a Harvey G-700:
1. It's really quiet. 61-72 dBA
2. It fits under a workbench and the garage needs a space for assembly, etc.
3. No more venting outside - something that's mandatory if the garage is to be cooled over the summers.
It's supposed to be here around the 19th of this month.