What do I need? Not 100% sure. The built it thermometer and the spigot perhaps? Any downside to having those?
What about a false bottom? Isnt that kind of like a strainer for the bottom?
Yea, a lit would make sense.
You need to listen to me! No, hah, just kidding.
Look it's like a ball of string and you can make it as long as you want. You want to invest in only one pot. you keep going back to 10 gallons which most people do and there's nothing wrong with that. If you get a sweet 10 gallon pot with all the bells and whistles it will serve you well. The problem is you haven't said how you are going to brew. How you are going to brew matters.
If you are going to go full volume with a bag, the pot you need might be different , then if you are going to use a cooler with a false bottom or another pot with a false bottom. A sightglass, I would think, would be way more important than a thermometer. A ball valve on the bottom would be nice as well for transferring without a pump. You might want a pot with element holes for tri Clover clamps. Investing in a nice pot isn't the worst idea, but it's not the best idea either imo, but it seems like it's what you want and that's ok. Those expensive pots are expensive for a reason and in time I'm sure their value will become clearer to the user. Ss is almost always seen as better by people because it remains shiny, has no fear of aluminum disease scares, and is quality stuff. I like to remind people that the emptiness inside the pot is what makes it valuable.
I am strong enough to easily lift 13 gallons in a pot and don't need ball valves or anything. I also Brew outside and I like to brew quickly. Everything hinges on how you want to Brew. But even not knowing how you want to brew, a nice Kettle will always be nice, and will hold some of its value to. As a final thought when you buy an expensive Kettle it will have all the bells and whistles so it takes some of the thinking out for you. There really is no one right kettle, that's why everybody has a couple. People go up in batch size and people go down in batch size. People start on gas and go Electric. People Brew on stoves and then Brew outside. A good kettle would be worthwhile though sure. It's only downside is expense I would think. Bottom line is if you have the money and want to spoil yourself with a nice kettle it's your world to do what you want. I would personally rather Brew in a cheap kettle and have nice speakers. Some can afford both and thats great, no judgement here. There's way more Brilliant Minds than me and they can help you if you tell them how you brew.