The one I bought (in June 2009) was the Actron CP9449 Brake System (ABS) Diagnostic Scan Tool. It was $130. then...I see it is $92.69, now.
There may be a better choice, but this one worked great for me. I noticed some people complained that when they got it, their car was not covered?
PS I noticed the Actron CP9580 AutoScanner Plus OBD II, CAN & ABS Scan Tool came out in 2010. It does more than the 9449 (like read OBD II codes) and at $150. might be a good choice if you don't have a OBD II reader.
I ended up paying $250. to get both types...so they are getting better and cheaper!