As far as I can tell, there are two known good boards, the Texas Instruments TPA3255 EVM evaluation board, which is about US$150 but was on sale for half price (I have one), that you can use for 1.0, 2.1, 4.0, 2.0 systems.
For 2.0 systems, the 3e 3255 stereo board is also a good implementation...