Dave,
Something to consider: I tell ww'ers learning the art of sharpening by hand is a very worthwhile - and not difficult effort, and I am suggesting you consider it, too. I do use a 6" grinder for the occasional bevel reset but it is rarely ever used, maybe once a year.
As I see it, the two main reasons for a power sharpener are:
1. Time saving. But consider, once proficient, you're back to work in 1-2 minutes by hand (less time than changing a stone, setting up and doing it by machine).
2. Accuracy. So how accurate does a bevel have to be? Many people get hung up on a precise angle and while you need to be fairly accurate, a 5° difference in a bevel is of no practical consequence so even jigs are unnecessary if hand honing.
Personally I wouldn't even consider and expensive machine unless, perhaps, had a production shop with employees in which case there may be some time saving and eliminate variables between people.
The only exception to this would be lathe chisels. I sharpen them with a grinder. I think the Wolverine jig is the way to go.
Like I said, something to consider.