I was reading up on the trains in the Netherlands ...
Apparently they've recently upgraded them such that the second class carriages are now what was previously the first class ones - so they're still really nice.
PS: If you're over 26 and have a first class ticket, you CAN sit in second class 'to meet other packers' - you'll just get strange looks from the conductors
(dont know if thats true with reservations etc). And just to confuse matters more - the whole over/under 26 issue is only for railpasses - if you get point-to-point or a country based pass (rather than a select pass etc) theres no limit (well, depending on the country).