7075 T651 (plate form of T6 sheet) is strong tough stuff, usually a bit more expensive than the others, but if you need high strength that’s the stuff. 5000 series is easily formed, but not super strong, and “gummy” to cut. 5000 series is work hardened (H designation, H32 for example) rather than tempered (T6 for example), so I suspect part of the reason it gums is the work hardening that’s caused by machining. I’ve never machined it to be honest, I’ve only ever used the sheet variety for making tv stands and drip pans when I was in the Navy, it’s not really used in aerospace as far as I know. 2017 is probably going to be more expensive on average than the 6000 series alloys from my experience, but if you’re getting usable drops for cheap then it’s a good choice. So to sum it up 7075 strong, a little tough to work with, expensive. 2017 a little cheaper, fairly strong, nice to work with. 6061/6082 not as strong, cheaper, easier to work with. 5052 great if you’re using sheet goods and making non-structural parts(I wanna say it’s popular for small watercraft, from memory), not fun to machine, work hardens. Even after doing this for many years it’s still strange to me that availability of these isn’t worldwide, but they aren’t. Like 2017 stopped being widely used in the US when 2024 came around (1930’s I think, again from memory), but the rest of the World kept using 2017?
Here’s a couple links with some decent info if you’re bored:
This is my favorite for understanding aluminum tempers
And this website has a database that will allow you to compare up to 3 materials with free membership (just requires an email address and they won’t send you a ton of junk mail):
The engineersedge website has so much info you could really find your rabbit hole there, I use it all the time;)