We have been using TRAC with VisualSVN but it's become a pain to work with, alot of outdated python libraries etc.
Because all our servers are on Windows 2008 we use VisualSVN, now we need something like TRAC but more native W2k8 support. TRAC is a good package, we just need: ticketing with comments to SVN, milestones, components etc.