Equally with this, this will yield no benefit over a normal 2.5 SATA SSD, so if it costs less to get a normal 2.5 or costs the same for more storage, I'd go for that instead.
Power supply 700W be quiet! Pure Power 10 700W 80+ Silver
Not sure on how IBUYPOWER work with PSUs, this one is a great PSU - just usually (depending on your location) it isn't the best value for money, so you may be able to save a bit there. That and your rig could probably easily run on a 600W (a good quality 550W is fine in most cases with the 2070).
Also what monitor and refresh rate will you be running at?