Your rig looks nice. To me, the only thing better looking than a tower of power is two of them. Yes, the V6 motors make way more power, but style counts and nothing has more style than a HydroStream with an inline 6.
The 150 long shaft motor is going on my 17' Baja. Bowrider. I will be using a jack plate, but the prop will be in the water 99% of the time. I may switch to a swept gearcase like yours as it worth a few extra MPH. I was lucky to end up with three nice louvered cowls. They are out there, but not easy to find. I do have the parts to run power trim on all three motors.
I grew up with OMCs and I still have a small Evinrude. As a kid in the late 60s/early 70s, I always thought the towers were the ultimate outboard. It wasn't until a few years ago that I decided to finally get my own. I had to sell off a couple of bikes but I can do a lot more with the kids in the boats than I can with the motorcycles. I have not run any of them yet, I'm hoping 2017 will be a big year for running these motors.

