Just regarding the built-in griddle, as mentioned, they’re a pain to clean, and will always look somewhat grungy. On a 36” range, it will also be tiny. Go check the measurements of those griddles and you will see.
People recommend the adjunct griddle that you can remove when not using and I agree (don’t get a cast iron one though, they weigh a ton). What I have though is a separate electric griddle. That way, I am not taking up valuable burners on my range while still cooking pancakes and eggs. I also take it outside in the summer and plug it in at the patio. Mine is a cheap Black & Decker I got like 10 years ago. It isn’t big enough. If I were doing it again, I’d spend the money on a much bigger one, it would be worth it.
Just so you know, kitchen appliances are made pretty poorly these days. Hang out on this forum and you’ll see complaints at all price points. It’s really a shame, but it’s the way it is. If I were you I think I’d buy whatever is the low cost range and be done. That way when it breaks you won’t feel as bad. Saving money there will also help pay for the expensive hood exhaust.
Q