so im in a search for my girlfriend a radar for her eclipse. i actually drive it like its my vehicle and once in a blue moon she will drive it..we will be in Dallas, Texas living there hopefully for a very long time. but in the present time we are back and forth on the I-20.. i need something with great KA detection, quick I/O detection..ive narrowed it down to the original escort 8500(refurb) to a new whistler pro 78se(or even a xtr690)...out of these three, which one is the most sensitive and will have the longer detection. i know the new 78 offers a super KA or something. but other than that i need some help guys..im not worried about falsing. i know this sounds like i need and want a V1, but just cant afford that much. and im tired of switching my rx65 from my truck to her car..whats yalls thought.?