as the title states
money in hand
http://www.plxdevices.com/products/sm/afr/
if you wanna spend the money 
yea ted was telling me about it
do you have one too
plx is the way to go. not to expansive and works great i used them at the shops i used to work at. pretty much dead on too. and they use a volkswagon 02 sensor
same as mine the display shows lambada,A/F,egt,and boost
you can data log on a laptop the O2 sensor can be run instead of the stock one and you wire the car in to the unit allowing you to “clamp” the A/F plus or minuse stoich if you want to display also has peek hold too
great unit especialy once you get the egt prob and boost sensor.
Mael
I have used the zeitronix before and it is a great unit. It will also read RPM values.
PLX is a great device too
^^ it reads rpm only when data logging it also has a second 5 volt imput that you can wire to you tps or maff or any other 5 volt out put on your car.
Mael
bump still need
ihave the innovative one if you’re still looking
sam
i can get my hands on a brand new aem wideband for 280 cdn
let me know
thanks