Daytona Sensors WEGO IV, best there is. Innovate is a crap shoot. Lot's of bad reviews out there, google both, you'll see.

http://www.daytona-sensors.com/WEGO4.html

I had a Dynojet wideband, it was OK, not real accurate.

With any 02 sensor, any exhaust leaks will make it read lean so seal your exhaust prior to the sensor location.

Also, I prefer to read a numerical print out, Daytona Sensors allows that option...Graphs sucks.

RPMs is a must, and really cool to see where your shift points are, Throttle postion not so much.