O2 Sensors, A/F ratios and the like..

Hi all, I've been looking for a A/F analyser setup to help me tune up the F100. I did a bit of searching and came across Tech Edge. They have a range of wideband oxygen sensor controllers available from basic to many-featured with data logging.
Not looking at controlling an engine with it, just analysis.
Has anyone had any experience with any of the Tech Edge units or has a suggestion as to any alternatives.
Cheers,
Scott
Not looking at controlling an engine with it, just analysis.
Has anyone had any experience with any of the Tech Edge units or has a suggestion as to any alternatives.
Cheers,
Scott