S.K.
If you are looking for an suv that will fit 3 bulky seats across you're going to have to go large SUV the honda pilot wont I have a booster (one of the larger ones) a britax marathon and I don't think I could fit an infant seat in the middle at all. So probably a suburban or a yukon, toyota seqouia, best bet is to vist a dealer and throw the carseats in there to see if they fit and how much room you have left.