Alex Pepper's OBD-II setup is the best OBD-II datalogging tool available.
However like stated unless you have the $650+ racer's package it's a moot point anyway. Plus like you mentioned as well you still need a wideband for A/F tuning.
The best solution for 99.7% of the people out there is to go to a dyno that has the SCT software and get a base program for the XCAL2. Chasing any type of mail order program is a huge waste of time and money.
