I am susceptible to motion sickness as well and I think the MD-80 is fine. The wild card is the weather/air as you can experience motion sickness on any size plane, but bigger is better (I have had a very few bad rides on 767's and 777's). Take some Bonine the day of the trip. It does not make you as drowsy as Dramamine. The bracelets are worthless (IMHO).