What do you guys use? I was looking at getting an OTC2000, then I was like well what about an OTC4000. Then I seen some programs on ebay that you can use your computer. That would be sweet cause I could take my laptop right out to my car. But I dont want to get one that requires costly updates and all that. Would like to be able to do OBD2 emissions. Oh and I was kinda looking at datalogging, this is why I was looking at the software for my laptop. Any suggestions?