All good choices. I bought the first season DVD when it came out, but rarely watch it. The second season really shows the development of the show over the course of the season, with the episodes that aired later in the season markedly funnier than the first few episodes from season 2.
What's great about this list is it shows that 1993 was a fantastic season for the Simpsons. I'm really looking forward to seasons 3, 4, 5 and 6 on DVD. Those are the joints that are going to get burn over and over and over.