Unsound,
"Walsh" drivers are an operating principle, not a specific design.
The older OHMs as well as the newer "Walsh" line models all employ Walsh drivers of different designs. So do German Physiks and a few others these days as well.
Each has strengths and weaknesses and user preferences will vary accordingly as is always the case.
Of course I think you know all this already, so just a reminder....
If you can find a pair of original OHM Fs in assured good working order in the target price range, they would also likely fit the OPs bill. Hoever these tend to be delicate devices and service and support for these nowadays is sparse though available, for a price.