Katana, the Santa Fe's 3.3 and 2.7l engines have been replaced for 2010 by a base 2.4l 4 cyl. and 3.5l V6.
If the OP is considering the Sportage and the Santa Fe, the Tucson and Sorento should also be on his shopping list.
Sportage and Tucson being compacts and Sorento/Santa Fe are (small) midsize.
Santa Fe now has a 4 cyl. AWD version added for 2011 but at very close to 4000 lbs, I'd opt for the V6 or the smaller and lighter Tucson with the 4 if he can live with the smaller cargo space.
The 3.5 in my FWD Fe is much more power than I need but it doesn't need a lot of revs in normal driving and returns very decent mileage with the 6 speed automatic. Unless you drive it like you stole it of course.
I'm getting +/- 10.5l/100 km winter and around 9 summer for mixed driving.