Several folks emphasize higher current, myself and Tom Barr included.
A lot of it is just overcoming a huge mass of plants. If you have a jungle tank like my 75g then... well I have in it up to 2 Koralia 4's (1200gph ea) a MJ1200, and 2 XP3's. I still had dead spots.
The only reason I would avoid excess surface current is perhaps with DIY CO2. With pressurized the CO2 is cheap and folks who keep their surfaces still are taking a big chance to save a couple bucks of gas. CO2 is cheap. Current is good.
I love the propeller type pumps. However one of my Koralias is making terrible noise after about a year (will have to check the actual date and warranty info). The smaller ones have ceramic shafts I think, perhaps they might be better long term, not sure.
For the maxi jet prop mods are you talking about the Sure-Flow kit? The only think I worry about it is if you have small fish, it has a good amount of pull in a smaller area than the Koralias as well as much larger holes. Something like a neon might be able to get sucked in easy. And the front is pretty open, a loach could easily get into it if you have fish like that. I'm working on some mods for the Sure Flow to make it small fish and loach friendly, as I plan on having a couple in my 240g.