Fuel injector size?

I am getting ready to install a Tork Tech Terminator kit and can't figure out what size injector to get. i've run a couple of the calculators online and for the power level I plan on going to (350 hp) 36lbs are the requirement but I want a little room to breathe so I was thinking 39s. But I also read that 42s are recommended...now maybe you can see my confusion.

I am leaning towards the 42s, but I want to ask if there is any detriment to running larger injectors? I know it will require tuning for the entire project, but even with the computer being tuned is there any reason not to go too large on injectors?

Thanks

Thanks for the advice. I found 42's for a decent price so I'll go with them...working on a terminator MAF and will make sure it gets calibrated in the tune.