I have been looking at data acquisition/management in an effort to improve my driving abilities and monitof my cars performance. Does anyone have any experience with the following:

Traqmate
http://traqmate.com/index.php

or DL1
http://www.actdigital.com/DL1.htm

and
http://www.g2xtreme.com/hardware/components.htm

Judging from the websites, the nicest sites are the G2x and Traqmate. G2x seesm to have alot more options for extra data plugs and the Traqmate has a video interface.

Tough to decide because I would also like to be using what everyone else is using or going to be using so data can be compared and shared. I'd like to monitor a number of different parameters engine-wise as well as gauge my own performance.

Anyone have any experience with any of these systems or a comparison or recommendation?