My vote is... an expert can maybe set an anchor with 15 feet of chain.
I'm not an expert. I also don't want to spend 30 minutes trying to set an anchor. That cuts into my boozing time (watch out, I admitted that I drink and boat!)

I like getting set once and not worrying about it for the rest of the day.
I see huge value in spending the extra money for as much chain as humanly possible.
Beginners can set an anchor easier (I'm in this category). You'll just hold better in all conditions because the chain keeps everything weighted down.
Good anchor rode can be spendy. And yes, chain is more expensive - but not that much more in the bigger scheme of things.
As for adding weight... considering I could lift the box with 120 pounds of chain when I brought it home, I don't think it will affect ANY performance characteristics of my boat. The same would apply to smaller Vistas. We're talking about 100 pounds her folks - roughly the equivalent of what? 10-15 gallons of gas or water? Plus, it's in the bow - so you will plane better at low speeds.
I would consider 30-50 feet an ideal minimum for how much chain you have.
I REALLY like having 150 feet of chain as I easily drop out 50 feet when I anchor in shallow water and I drop out 100-150 in deeper water. I try to keep my scope between 3-5:1. I have found that where I boat -7:1 is ALOT of swing room and not needed when there isn't a storm.
You will NEVER regret having more chain. You could, at some point, regret not having enough chain. Chain works for anchoring in all lakes and bodies of water... mud, rock, whatever. It's guaranteed to keep that anchor down.
As for marking chain - I went a different route and I measured the amount of chain the windless lets our per second. If I want 50 feet out, I run the windlass for about 20 seconds, start backing up a little, and then let out another 5-10 seconds worth until I feel the anchor grab. Has worked every time for me.
It's also different for every boat, every body of water, every driver. Above is what works for me in the Pacific Northwest, with a v318
