www.seat61.com is the definitive website on any wanderlust involving trains. I've looked at doing london-japan via the transiberian and would be near the top of my travel to do list if i had time and money on my hands. It must be great to be able to grind out enough cash online to enable you to travel. Im sooo jealous. Hope you have a great time if you do do this.
If you are interested Paul Therouxs 'Ghost Train to the Eastern Star' is a great piece of travel writing where he writes about his journey from by train across Europe and Asia which involves this route
Author