I hope you read this because this is what you need,,,,,,,,,,,,,,,TRUST ME.
There are quite a few big pieces of music that some of the others have already recommended.
Newbee mentioned the one that I personally feel is the absolute best symphony of all. Even if you don't dedicate your entire weekend to it,,,,,at least give an evening.
Leonard Bernstein & the NY Philharmonic,,,,,,,,doing,,,,,,,,,,,,,,,,,,Tschaikovsky's 5th Symphony. This is by far one of the most emotional, enjoyable, underated scores in classical music. You said you wanted big right,,,,,,,,,,,,,,,,,,,,,the last movement will leave you gasping for air! I hope you give all of the previous suggestions a try since they are all good.
BUT I REALLY, REALLY HOPE YOU GIVE THE 5TH SYMPHONY A LISTEN THIS WEEKEND!!!!!! I'd love to hear your thoughts on it.
Best of luck,
Happy listening!