I prefer to use Oxford dictionary to confirm my pronunciation is correct, if necessary, Cambridge dictionary is a good alternative as well.

hope can help your pronunciation

I think the Oxford dictionary is widely considered to be the "standard" British English dictionary. Australians use it as well.

http://www.oxforddictionaries.com/

The Cambridge Dictionary:

http://dictionary.cambridge.org/

You can also find heaps of recordings by native speakers on Forvo. You can also hear different accents in it. If you don't like any of the given recordings for a word, you can always request more:

Www.Forvo.com

consize oxford is the best