I like the innovate setup. LC1 wideband kit, OT1 (or OT2) datalogger, and XD-16 gauge. The gauge fits in the srt pod and can read AFR as well as 4 other parameters. The LC1 is a simple wideband that allows you to monitor your AFR. You really only need these two things, but if you want to datalog without using a video camera, get the OT1/OT2. It allows you to monitor AFR vs RPM as well as up to 12 other pids selected from a list of several dozen options. The OT1 hooks up to your laptop using a supplied computer cord. The OT2 does the same stuff, but sends it wirelessly to your iphone (w/ free app) or your laptop.
You send the datalogged information straight to your tuner. they get the most accurate info possible. AEM and Aeroforce w/ wideband kit dont allow you to do this... you have to use a video camera which can be challenging for the tuner.
If you're interested, I've got the XD-16 and and extra LC1 for sale. You'll just have to get the OT1/OT2 which are about $150. For about $300 you'll have a full wideband/datalogging system. Its hard to beat that anywhere... PM me if you're interested.