I went with the Weggo for data loging reasons this way I could down load and read the charts on the A/F verses rpm and TPS position and make A/F changes as I wanted via Tuneboy of course this was pre PCV which I am thinking will turn out to be quite a piece especially when used with the autotune feature. I don't think they will have the ignition timming features of tune boy. But they will compliment eachother. If I were you guys I would first decide which way your going Tune boy or PCIII and or PCV.
You must also realise that I am using the upper end of the fuel pump and had to change to a Walbro with the forced air systems it is easier to lean out. I roasted two piston at a rather high speed and it was do to running out of fuel but it was above 7200 if you not running over 6700 and staying NA I would not worry about it get a good dyno tune and enjoy the ride. Of course if you are like me and starting to push the envelope then a A/F gauge is a must. Let me read up on the Dynojet one some more before I form a opinion as it is not fair to them since I am use to the Weggo.