Best SUV for family driving

[Horsepower]

The Hyundai Santa fe isn't an SUV. It's a CUV, so you can't compare the toughness of the fortuner and the ms when it comes to off-roading.

but when it comes to riding-comfort, Santa fe would be a good choice, since it's a CUV and the car-like feel when you're riding it

No, it's not a CUV.

It's a midsize crossover SUV.

CUV are small cars like Tucson, Sportage, Rav4.

The toughness remains to be seen since it's fairly new (2006) but so far, it doesn't exhibit any problem structurally whatsoever.

As for the question, the best fullsize SUVs I've tried so far that can seat eight in comfort are:

Hyundai Veracruz, Nissan Armada, Chevy Tahoe (2008) and Expedition.

but KIA Carnival should fit the bill quite well being a minivan with sliding doors and terrific engine.