I like the Innovate LC-2 wideband because it has a 2 outputs you can use; 1 for the digital gauge that is included, and 1 for connection to an ECM or something like a powerlogger. I have used it on both my own cars, and multiple customer's cars. It comes with a free LogWorks software from Innovate that is a built-in data logger and is a great no-cost tuning device!
At our website
www.boostedrps.com we, RPS, sell the LC-2 without the digital gauge, which is how Full Throttle sells their LC-2 setup, yet we sell the same LC-2 setup as they do, with the 8 foot length cord, however our cost is $175, compared with their $199.99..
Now we also sell the LC-2 WITH either a Green, Red, or Blue digital gauge for $199....so for the same cost as Full Throttle, you would get a digital air/fuel ratio gauge, providing instant readings of your air/fuel mixture.
We sell the MTX-L for $195, if you prefer that gauge setup as well.
Here is a link to show you this wideband gauge:
www.ampefi.com/product/innovate-standalone-gauge-kit-w-lc-2-blue-db-gauge-3795/
For the price, the MTX-L is hard to beat. I believe Innovate actually won an Industry-Award for fastest sampling/reading wideband sensor system, which the MTX-L and LC-2 both utilize.
The MTX-L can be easily hooked up to your powerlogger, or Megasquirt if you ever went that route, and if you got an OT-2 you could even send the wideband data to your phone!
Plus, the MTX-L can be setup to not only display gasoline, but E85 or even methanol as well. Really versatile wideband gauge! Since my personal LC-2 was stolen recently, I'm actually going to be trying out the MTX-L on my car, instead of buying another LC-2.