Got a great one from eBay for peanuts, but have had to fit it with softclose hinges. I found them to be way beyond my budget, even anything from Ikea. Any local auctions? Some charity shops do furniture, though it often goes quickly.
We bought one that goes with our lounge furniture, so it blends in, it's doubles as a place to put your coffee cup, and an occassional extra seat for when we have visitors. Eventually it will become a home for DVDs etc.
I supppose ours is probably technically a blanket box rather than an actual toy box.
John Lewis online have a number of nice wooden blanket boxes with pneumatic hinges. We bought this one: http://www.johnlewis.com/230516452/Product.aspx It's expensive at £100 but I figure its simplicity means it will be used for years...