AV1200 is top of the line right now, that allows for 4K HD streaming and all that sorts. If it's just the Apex, AV500 is more than enough.
Amazon just had a AV1000 model for $40 after discounts, but that expired. So if you can wait to save a few bucks for a higher model, if not an AV500 model is sufficient.
Best that the Powerline and PC/Router/Switch is installed on the same electrical circuit/breaker, and no surge protectors (both Powerline modules plugged directly into wall).