Looking for Feed Analytical Tool/Script

I have been looking for a good feed analytics tool or script that is as good as Feedburner but haven’t yet found any. Anyone knows of any that fits the following criteria, please do let me know:

1. The most important statistic that I’m looking for is the number of subscribers to some particular feeds with accuracy as good as possible as Feedburner’s. Some other statistics can be a bonus.
2. Would be best if the script can analyze from server logs though I wouldn’t mind if extra client-side or server-side scripting is needed.
3. Hosted on the same server as the feed (preferably), if needed to be on a separate server, no delays are being introduced.
4. Best if I can still keep the original feed URL without redirecting.

The reason Feedburner doesn’t fit what I need is mainly due to point 3. I know there is a paid service from Feedburner that satisfy point 4 above but I believe the 30-min delay would still apply even if I am to use their paid service.

Anyone knows of any script or tool that fits the above criteria for feed analyzing, please do let me know. I thank you in advanced for that.