is 350 or rx 350

I own an IS 350 so obviously I prefer that one the most. But then I would get the GX 470, RX 350, then RX 400h

GX470 for sure.

400h has a much better gas mileage than 470 but 470 is a much nicer vehicle.

It really depends on what you want from the vehicle. GX470 looks nice and sits seven that goes pretty much everywhere. The 2008 model will have minor revision mostly exterior changes, but the rest remain the same. The RX400h is an awesome SUV with all the luxury amenities as we as excellent gas mileage. You get on average about 10 mpg better than the regular RX350. Even though it has similar horsepower ratings as the GX470 and the RX350, the hybrid is actually much faster because electric motors provide instant power where as regular gas engines take time to build up momentum. Try 50-70 mph on a high way with this thing. It is even faster than most V8s while getting much better mpg. This SUV is extremely quiet around shopping centers, in the neighborhoods, and in rush hour traffic because the engine is off. So you are riding on electric alone. Anyways, IS350 is also a great car to consider!

I would get the 400h. its hybrid, and 0-60 in 7 sec.

I am not sure about gas mileage or engine power but I like the style of gx more than 400.