When it comes time for new wheels on my other bikes, I'll be switching from Aeroheads to
A23s.
My commuting bike uses 559 wheels. When I decided to convert it to disc brakes, I bought an inexpensive set of wheels that use Sun DS2-CX rims. Getting my 28 mm wide Conti Ultra Gatorskins on and off these wheels is so tough that I've been threatening to rebuild them with Velocity rims ever since.