I'm SUPER happy with my electric fans, and they don't have a "box shroud" because I use OEM fans. They outperform every mechanical fan I've run (which isn't as simple as saying they move the most CFM either).
An electric fan system isn't that complicated. The electric fan(s), some kind of controller which can be as simple as a thermostatic switch, and a relay for power. This is my entire set up
I hate wiring. Hate it. If I can wire up a relay system for dual speed, dual electric fans, well, it's not that hard.
And yeah, simple can be inferior too. How many CFM does your fan move at idle? If you can't answer that, how are you in a position to make recommendations?