Which website directories actually produce good sales leads?

[happy]

There are so many web directories out there but which ones are worth paying to list with? The only 2 which send me lots of customers (which are free to list with) are www.somucheasier.co.uk and www.shopsafe.co.uk. Can anyone recommend any others which send them lots of traffic?

[Inquisitive]

What is your target market? It depends on what your selling. Can you be more specific?