I'd get Wheel in Space out of the way (aside from anything else, part one is possibly the least audio-friendly episode of the lot, even more than Space Pirates 1), as Savages might prove a pleasant surprise to end on. At least, when Tavern discussions about 'What story would you like back most?' get underway, about 20 minutes in, once the usual suspects have all been mentioned, someone will usually say 'You know, I think The Savages might be rather good actually,' and everyone else tends to say 'Me too...'