The b550 boards we have here atm are pretty expencive compared to the x470. Im just worried that if i go with the b450 ill loose an upgrade path to ryzen 4000 series. As far as i know only the 500 series boards are officially supporting them burt im pretty sure the x470 series will get a bios update, the b450 im a little sceptical about. As for the cpu options if i go 3600 i pay about 50% more than the bundels i listed. The plan was to go 3300x but SA only has 3100 for now.