shameless self promotion but might help you:

http://www.fodors.com/community/euro...and-london.cfm

With that many gtrain trips in Benelux you may want to look into the Benelux Railpass, valid on trains in Belgium, Netherlands and Luxembourg - hop on any train anytime - and yes no one flies between Amsterdam and Brussels anymore with the fast trains doing it in less than two hours city centre to city centre

Anyways for lots of goodies on Benelux trains check out www.seat61.com; www.budgeteuropetravel.com and www.ricksteves.com.