Get the 2060S rather than normal 2060 or 1660. RTX or ray tracing in general is the future. AMD says they will incorporate ray tracing on their next chip, PS5 will have hardware ray tracing, and so far, devs are loving ray tracing because it saved them some work of manually configuring the lighting. For now, very little game release with ray tracing because there's so little consumer base that have RTX cards. but all of that will change once AMD embrace ray tracing, and console games support it. So yeah, for future proofing, get RTX 2060 Super. but if you're planning to change GPU next year, then 1660ti will serve you just fine.