Didn't you read and understand Muttley's opening post? No electronic tuner can make your guitar perfectly in tune for all keys. There are tuning compromises that you have to make, and you have to do them by ear. This is because of Mathematics and Physics.
That was the single most intelligent post VP has ever made on this BBS and you went and slammed him for it.
The Peterson tuners are great and offer tempered tuning options, programmable temperment, and even transposed tunings for use with a capo. I have a VS-II and it is the shit.
The new rack mounted ones are even bosser but not as portable.
Peterson StroboRack | Sweetwater.com
Just because it is an electronic tuner it isn't limited to equal temperament tuning only.