I've used the AEM Gauge type wideband and the Innovative Motorsports LM1.
The AEM is very nice and of the two my preference. Better readout and the option of wiring it up for a basic datalogging function or the ability to switch outputs between a 1v or a 5v output. This can be wired into your stock signal as well as run to the gauge, so you could run this without having to weld in a new bung into the exhaust.
The LM1 is more intended for tuning. But not the best for on the fly tuning the box has a small display and reading as you are makings runs and trying to compare with a laptop screen isn't easy. They have a lot of plug ins for logging and accessories, but this brings up the price.
The one that is probably next on my list is the new Autometer wideband gauges. Probably use this on the Vette, and put the AEM in my Jeep when it gets Mega Squirt.
I used the 30-4111 - Black Face with Black Bezel (30-4121, 30-4211 & 30-4221 Are all the same just different choices for colors).
* These are a single channel gauge part numbers only.
If you want to run dual O2 sensors (one for each bank), you will need the UEGO controller, and then a gauge or 2 to monitor readout(s).
You could always run two single gauges and use the 1v output on each to run into the stock ECU. This is probably cheaper than the controller and two gauge faces for monitoring.
I use the LM-1. It allows me to connect the auxbox and do standalone datalogging. I also use it to feed the second analog output into the 3 channel A/D interface for the autoprom, which allows for real time monitoring and on the fly program changing in the emulation mode. The auxbox has some great features, but the setup is a little expensive. It has two built in accelerometers that can give you HP and G's. It's very versatile. I have never used another brand, so I'm not going to knock anyone's equipment. Just thought I would share my 2 cents.
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What Widebands
