I agree. I have an Eheim 1262 on my 72 running through the chiller and it is fine. I also have a Vortech, so it's all good. Besides, Eheims are indestructible. Great pumps.I have an Ehiem 1262 on my 58. Since I have it going through my chiller, I get ~300gph. It's not enough flow. I have a Vortec, so I'm covered though.
I think an 1100 GPH split the correct way would be great for a 65. You only want about 100gph going through your phosban, and either split your return between your chiller and your tank, or all of it through the chiller and into the tank.
B