I have the NOCO you're looking at.
I used it to jump a 4cyl accord twice within 5 minutes in freezing temps when the booster was 75% charged. There wasn't an abundance of cranking power, but it started.
It failed to jump a totally dead 6cyl van (didn't even crank), but in all fairness that van took another vehicle with jumper cables over 15 minutes to jump. I actually think the booster would have done better with the dead battery disconnected.
I like that NOCO is an Ohio company, and it is a quality unit, but I'd go bigger than the GB40.