I was hoping that this thread would help me make a decision. The one I did find and kinda like is this one from PLX
http://www.plxdevices.com/wideband.php . It comes with the Multi gauge. but the bosch sensor. I have a rtek right now and I am still new to it. I am pretty sure my stock O2 sensor took a shit because when I data log I get about 0.02 volts at idle. well most of the time. I can't justify spending 1500 on a sensor. Maybe 250 to 300. I am running less then 10psi with a stock ported engine.