Avoid all of Indiana! Although there has been some work done on the Interstates (and I-70 is greatly improved), they are still (all of them) too bumpy and those expansion joints at bridges are still horrible. About the time a section of Interstate gets all fixed, repaved, or widened, within 24 hours "they" are digging it back up again and then patching with massive bumps and stuff. So, any repairs on I-70 done in the last 3 months will be trashed by Spring!
Avoid Indiana, there just simply ain't any good Interstates. If you do come through Indiana, take US highways. They are MUCH MUCH smoother than the Interstates.