I've been using Sonarr among other apps for around a year now and find it's working great with regards to keeping a healthy ratio on private trackers. Sonarr itself could be a little better though - having the option of specifying something like an indexer priority or having an indexer per show would be good and support for IRC announce channels.
Some people have come up with their own solution to using irc autodl with Sonarr and I'm wondering if anyone here has?
Why bother? Just to get in there a bit quicker and build a better buffer. I'd not want to over complicate things though - I use my indexers today through Jackett for the search ability.