I have a Tandberg Series 1800 StereoReel to reel tape recorder, its a good unit and im happy with the sound, I was thinking of selling and getting a TANDBERG 64x or 74b Strereo , would like a cross field machine of this type that has 7.5inc per sec . my Series 1800 only does 3.75 inc per sec. Anyone have any experience with these recorders and how they compair to the quality of my 1800. Thanks.