Although I've been to Quebec City many times, I've never taken the train. Sorry, but I can't offer any assistance or comment on that. However, expect your visit to Quebec to be fabulous; it is a truly wonderful city. Definitely try to get accomodations in Vieux (Old) Quebec, it is the historic part of the city, and in my humble opinion, the most charming part. There are loads of quaint shops, incredible architecture, and awesome restaurants. Stroll all through Vieux Quebec, take a walk along Dufferin Terrace (the wooden terrace adjacent to the Chateau Frontenac on the river side), walk to the lower section of Vieux Quebec near the river. If you have a car and the time, taking a ride to St. Anne de Beaupre is a wonderful way to spend an afternoon. You can see the huge cathedral there, and stop at the morency falls along the way. If you can afford it, stay at the Chateau Frontenac, it is truly spectacular. Other hotels that I can recommend in the area are the Hilton and the Loews Concorde. The Hilton has a nice rooftop pool and a good executif club (if you have gold or diamond status with Hilton).

See also this thread for dining suggestions:

http://www.flyertalk.com/travel/fttr...ML/000057.html

Have a great trip.