Sways, endlinks, struts, and lca bushings will make huge improvements.
If you are interested in lowering your OB there is a ton of useful info on this site, and several members at stock Legacy height or lower with their OBXT.
If you want/need to keep the ride height, here is a thread on an Outback forum with a lot of good suspension info.
http://www.subaruoutback.org/forums/...nsion-faq.html