I found out today that there is a little-known feature that lets you filter the DZone RSS feed. For example, if you want to filter the feed to only receive top posts for the week, you simply add a "range" parameter to the feed:
Additionally, you can also sort the feed by the number of clicks instead of votes:
I'm not sure what all the possible values are for these filters or whether more filters exist. Just thought I'd throw it out there for anyone else who enjoys the DZone RSS feed but doesn't have the time to keep up with the volume of posts it generates.