Guys, they never stopped making the Thunnus, its just that Shimano Australia stopped importing it for a little while. As Kevvie has already mentioned, they are superb
I once used Baitrunners but moved over to the Thunnus a few seasons back and they are a better reel. Their metal body is the key when using heavy braid. I'm running 65lb braid through my lot and no dramas so far. They even survived 8 days of punishment in Cairns.
Baitrunners are fantastic reels for their asking price They are dependable and have stood the test of time. Best value reel by a country mile for those intending to use 50lb braid or less, however i know a couple of guys who run 80lb through theirs and have taken some impressive fish. You won't be disappointed with the trusty BTR for the money.
Cheers
Red