Olddog,
You are in the mid-West so it may not be the same however, New England roads are better managed with IRS. Solid axle light cars tend to skip on rut filled roads and pavement variations in corners. I can say one ride through Boston with a solid axle car will make even the most die hard solid axle man question his choice.
IRS sticks and skipping is of no concern............I have done it both ways....
My 2 cents,
Jeff