I would recommend Ingo’s LED clock board. I messed with the stock one so many times, fixed it, then straight back to issues after a day or two. Totally worth it. Never had to touch it again after that. I second the color DMD, it looks amazing on TZ. Get the magnet mod for the wire form diverter to the mini playfield to eliminate the ball bouncing back (cheap and worth it). Also get the upgraded slot machine scoop with the support for the target right next to the slot. That target gets drilled and will bend over and over - the upgraded scoop has a support bracket attached to reinforce the target. I also really liked the piano mod along with the gumball dazzler light kit. Switch kit for the mini playfield is also a great mod. Titans are also a great idea. If you are gonna shop it, I would highly recommend Titans to extend the time between replacing them. I sold mine last year and I still miss it. It’s a great game and totally worthy of modding out.

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I agree that too much purple is not the way to go. It is also a good idea to order your own LEDs vs a pre-made set. I have ordered a few and not liked what came in them and switched a bunch out later on. I build my own stadium lights and use those to dial in the playfield color. I did end up switching the purples out out at some point and have started putting WW leds in almost all of the GIs in games and color matching the inserts. Over time I have found that I really like the natural artwork on most games and WW is a good way get that.

Here is a link to the reinforced scoop.
https://mantispinball.com/product/twilight-zone-slot-machine-scoop/

Diverter Magnet:
https://pinballpro.net/shop/twilight-zone-diverter-magnet-tz-dm/