This setup will tow like a dream. I recommend the Catcher over the EZ because of how it responds on the low end.
Analogy:
If your trailer is like a running back carrying a football, then the EZ is like a 200-lb, 4. 8 sec 40m defender wrestling him to the ground.
The ECM would be like a 300lb 4. 0 sec 40m defender running from a 10 yd headstart and knocking the runner's block off.
The ECM tears into a load like a caged lion does steak.
It's awesome.
Oh-- and you REALLY should consider some kind of exhaust brake. All the power in the world is useless if you can't get down the mountain.
There are TWO sides to every hill, and you'd be wise to equip your towing truck for BOTH of them. (uphill AND down)
jmo