Ride betwwen OME and Bilstien is about the same , have ridden in maybe 10 of each and very little difference.
Ironman rides a little bit firmer i think than OME which is good. Not firm to a point of being rough riding, just firm enough to fell in control and the ride is good
Either OME or Ironman are good picks I think.
Ironman can be a little harder to install since they do have an extra coil so the common spring compressors don't like to come out after compressed. ( I never use those spring compressors but just a warning if you try) Other than that pick your poison either will give you a good ride, better handling, better stopping, better overall performance on road and off