[DanEC]

At 5'10" you should be able to work out a good seating position in most cars. Sometimes it involves removing the adjustable seat tracks and going with a fixed seat position. At your height you probably will be OK in most cars, in most seats and even with adjustable tracks. Kind of depends on the length of the upper torso. But the good thing is that there is quite a bit that can be done to customize the seating position to your needs.

I have not taken a long highway drive in my car but I think ear plugs would be a good idea if you care anything about maintaining your hearing as you get older. Actually, it's not all about the sidepipe noise - but also the wind noise. The wind and traffic noise on the left ear for the driver on the highway (opposite for passenger) can be pretty loud at speed.