Well, the TW203 will outlast the TW32 by a factor of 3:1 to 4:1. Mine has 20,000+ miles and is not worn out. The TW43 will outlast the TW204 by about 50%. I got about 10,000 miles out of mine, and I get about 15,000 miles out of a TW34.
Cheng Shin, Michelin, Dunlop, and Shinko also make street tires, but not all are available in all markets. All have good reviews.
Phelonius, what tire pressure do you run in the front and back on those Bridgestones? I just bought my first TW and it came with a set that I'm going to run for commuting around town. Do you vary from the manufactures suggested pressure at all?