I see little reason for the TS 75 unless your work will be with a lot of 8/4 (2X) and thicker stock. Just more weight to lift each time you use it and a need for a longer guide rail. The more I use my Festool products, particularly the TS 55 and various sanders, and compare them to my other tools (excepting my Inca jointer/planer and my trusty old Milwaukee corded tools), the more favorably impressed I become. Why? Because they come closer to working as advertised than the others, and don't need a lot of fiddling around to adjust them. In contrast, while I still think it a good tool, my JoinTech "Cabinet Maker" fence machine and router table extension for my General TS required many hours to setup and adjust before working well. My TS 55 came with toe-out instead of toe-in, but even so, it still cut rather cleanly when trimming several new oak passage doors. My Domino required no adjustments.
Dave R.