RSS feed caching

I wonder what would be the best WP plugin to choose if what we want to do is simply cache the RSS feeds of our site? The reason I ask is that we have a high traffic site that does create HTTP requests to WordPress to pull in and parse those feeds. I’m caching them on the request side, but thought it would also be a good idea to cache them on WordPress so we don’t hit the database every time a request takes place in the event the WordPress database hasn’t been recently updated.

Thanks for any wisdom on this issue!

Chuck