Good shot, b . . .
There's a lot of good info out on the net. The important thing to remember is that everyone has personal tastes in the matter of wine, and most people are not traditional at all. White with steak and red with fish is not nearly as unheard of as TV sitcoms might wish.
Tom's ideas are good as well, but a bit labor-intensive. You could simply ask your host for a preference. You might not like the choice, but you could fix that by perhaps offering a choice of beverage. Don't be embarrassed by this. Some prefer dry, others sweet (I'm considered sweet).
If you're going to be there a while after dinner, I would also suggest a sweet, fruity wine as a dessert treat. My personal fave is mango wine, at about $9 a bottle.
Good shopping.