Thanks everyone for the replies - looks like this is the site to be at!

I won't worry about the light for now if you say it's quite common, and hopefully I'll sort it on Wed.

I don't mind the hard suspension over uneven ground, but driving at speed on good A1/M62 roads I just seemed to feel it more than I thought I would. As Tony said, maybe it's just due to the stiff ride. Hard to tell when you're new to the car.
Maybe I'll ask about the wheel balancing when I take it in.