Aluminum boats are light. That's one of their advantages, and one of their cons. Easier to tow, fuel efficient, typically don't require as much power, easier to maintain etc. The downside of that lightness is often in ride quality. I've never been on an Aluminum boat that rides as well as glass in shitty water. Especially on the ocean. It's just a trade off, and only you can decide how important ride quality is vs the benefits of the lighter boat. Quality suspension seats can help a lot here, but they can get quite expensive and still only help so much.
On the surface most Aluminum fishing boats you'll look at will appear similar. The difference between a well built boat and one of lesser quality comes down to the details. Hull thickness, weld quality and wiring are a few of the key areas where the difference between builders becomes obvious. Look beyond the surface. Look closely at as many welds as you can. Look closely at the wiring, not just what is easily seen but dig deep. Hardware is another big one. Latches, hinges, visible bolts/screws etc. These are all areas where many builders cut corners to save money, but when you are dealing with saltwater all this stuff can quickly start to wear and fail.
Some other things to consider are hull design. A more flat bottomed hull will be super stable on drift but pound in the chop/swell. Self bailing or not. Personally since you mentioned doing some ocean fishing I would not consider a hull that wasn't self bailing. Especially offshore. I'm also personally not a fan of open bow boats on the ocean, but there are open bow aluminum boats built appropriately for that. Fish storage can be another thing to look at, especially since you mentioned tuna. In floor boxes are ideal, with overboard pump outs. A non self bailing deck with fish boxes that drain into the bilge means all that blood and mess goes into your bilge every trip. Not a fan of that myself. Lots of small amenities that are worth looking at as well. Plan to fish downriggers? Having a boat wired ahead of time is a plus. Rod holders? Can't ever have too many. Also their location can be important depending on what fishing you do and how you do it. If you plan to do tuna you'll likely want to think about a bait tank. Maybe not right away but if the tuna bug gets ahold of you you'll want one at some point. At least think about that when looking. Most of the higher quality builders will work with you to make small customizations to insure the boat will fit your needs. Some of the builders of the cheaper boats simply pump them out of the factory with no room for modifications.
I recommend searching online for FB owner groups, forums etc for the brands/models you're interested in. Reading the thoughts and experiences of owners can go a long way. Certain builders have some pretty nasty reviews from owners. Dig deep into Kingfisher and you'll see what I mean. I'm always a fan of hearing the first hand experiences from owners of any sort of expensive purchase.
Electronics are always personal choice so doesn't really factor in to a builder selection, but be sure to factor that into the budget. And since you're planning on the ocean be sure to account for radar.
A well equipped 24' boat can definitely do tuna on the right day. Since you have the ocean in mind don't skimp on power. Many boat show style deals come with minimum power, which can suffice on the sound but on the ocean can be annoying at best, and downright unsafe at worst. Being under powered in a decent following sea can quickly get you into trouble. It's cliche to say but nobody ever complained about having too much power, especially on the ocean. You'd be amazed how quickly a speedy Puget Sound boat can turn into a slug when fully loaded down on the ocean.
5 people on a 24' is doable but not very comfortable. Duckworth has a great reputation and builds a high quality boat. They don't come cheap, but no quality aluminum boat does these days.
Anyway, just some random thoughts that come to mind. Hope this helps.
Boat shopping is so much fun.