Peake is what I use. Some people ***** about not understanding the manual and the tables, but I never had that problem. Then again, fortunately, I didnt have to use it much so I can't say I have extensive experience. But it's hella handy.
MAXRPM : Just bought mine and very pleased with it. Easy to use, show's all the available codes.
See one of my earlier posts in relation to the new RX3.......and cross referencing the against the tables. It directs you to the wrong table, but the company is aware of this. Regardless of which table it sends you too............you should always cross reference against table number "18". They're addressing the issue, but apart from that minor glitch is the perfect code reader.