Quick Answer
For most observers in 2026-2027, the best months to see Saturn's rings clearly are around opposition season, when Saturn is brightest, highest in practical nighttime windows, and easier to observe repeatedly. Use low power first (50x-80x) to center and stabilize, then step to 120x-180x for ring shape and shadow detail. Reserve 200x+ for nights of steady seeing only.
The biggest performance difference is not your headline telescope spec. It is timing + seeing + eyepiece discipline. A modest, well-cooled setup used at the right altitude often beats a larger telescope pushed too hard in poor air.