So i started buying my loop stuff today. Im torn between doing a pump/res combo or a seperate pump and reservoir setup. I purchased the EK Coolstream PE 360 and some primoflex tubing kit but i stopped there. Im torn on what to do about a reservoir and pump. I want really good flow because i might be adding 2 gpu's into the loop later on when i do my next gpu upgrade. I was looking at the https://www.ekwb.com/shop/ek-xres-140-revo-d5-pwm-incl-pump combo but thought well what if that pump isn't enough? Will this fit into my corsair air 540d case......etc. I will also be adding in a 240 rad as well when i do my gpu addition but for now i just want to get up and going. So pump/res combo or seperate? What pump is the right pump?