Sawmill works like a champ! I'd check it out... at least run the trial. http://www.sawmill.net/
If you aren't getting what you want with Sawmill, call their support. I called them and they will basically bend over backwards to help you get what you want out of their product. If not... there are other options... just not ones I remember being in the same ballpark as Sawmill.
If you're looking for a $$$ solution, try www.logrhythm.com. They have support (albiet kind of haphazard) for several Juniper models (among the 1400+ that they support).
If you're simply looking for a log collector, try www.splunk.com. The configuration takes about 15 seconds, but the user interface (at least pre 4.0) is not very intuitive, but it is easy to search.
Another good $$$ product is called Clearview from NWG Technologies. Its an appliance and the GUI is very much Juniper SA like.
Which syslog format works for Juniper SA? There's a long list that Im not sure which to pick. Output as "Standard" at Juniper SA. Thanks!