I deleted everything, including moving my wallet directory out (may not have mattered) from the %AppData%\Bitshares X directory by doing a shift-delete on the directory. Relaunched 0.4.9-a.exe. It seemed to sync much faster with a nice fresh AppData\BitShares directory and once sync'd I copied my default wallet back in and it's been stable ever since. All my cash is finally accounted for. There are still a couple "UNKNOWNS" in my transaction history but all my balances are correct.
This was after spending nearly all day yesterday refreshing, reinstalling, etc. Nothing seemed to work until I deleted the AppData data directory.