I have had my 33 for for 18 month now and have done 30000k in that time including two Bris-Syd runs. Have yet to have any mechanical failure. All the money I have spent is on good stuff so I am happy.
For parts, I think with any car its the same, once you find a good supplier you won't have a problem. I have never had a problem finding the parts that I have needed, just look around to find that supplier, as prices can vary dramatically. But again that is pretty much the same with any car.