It doesnt NEED to be 750w+, 650w is just fine, but when buildning a new one 750w is a go to when aiming for a 3080/3090. And the SSD should not be a m.2 SATA, it should be m.2 NVME and nothing else. Preferably 2 of them, one "smaller" for OS, and a bigger one for the games.
OT, wait til AMD...