I have nearly the same truck as yours with 50hp Bosch Motorsports injectors. I upgraded from stock 250K injectors that were beyond worn out so I can't really tell you how much difference you might feel, but for me it was night and day.
I'm very happy with how the injectors perform. Honestly though, if I had it to do again, I might stay with stock injectors to get a little more mileage. I can get 18 with my current setup pretty easy and might get a tad more if I babied it and kept it under 2100 RPM on the open road. The only real problems that I have is I need a little more fuel to the rail and one step up on the turbo. If I were making your choice, I would go 50 rather than 90.