I have an innovate LM-1. It was one fo the first widebands on the market. The LM-1 has a big box, but will record other inputs (like rpms, tps, MAP) and they can be view on a PC. The other plus is the LM-1 has an output so it can be used with EFI tuning software.
There's nothing special about the sensors. That dispaly is very nice. For cheap & simple - I would go with that for sure.