Another choice is royalty free drum loops done by a real drummer.
I usually use a combination of those, plus battery and a real set to add hihats and toms. A lot of drum loops also come with decent music loops as well so they're great for getting ideas started or just dropping them into a pre-written song to add some flavor.

Be careful who's you buy though. I bought a couple off eBay that were done by really amateur drum players and couldn't use them.

If you can afford it too, you can send your song to an online musician and have them lay down a drum loop for you.